Home / 6,420.05-9,630.11-1,977.66

Finding the Fourth Proportional to 6,420.05, 9,630.11 and 1,977.66

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Solution

The fourth proportional to 6,420.05, 9,630.11 and 1,977.66 is: 2,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.05 : 9,630.11 = 1,977.66 : x
  2. Step 2: Convert to fraction form
    6,420.05/9,630.11 = 1,977.66/x
  3. Step 3: Cross multiply
    6,420.05x = 9,630.11 × 1,977.66
  4. Step 4: Simplify right side
    6,420.05x = 19,045,073.45
  5. Step 5: Solve for x
    x = 19,045,073.45/6,420.05
  6. Step 6: Final answer
    x = 2,966.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 6,421.05, 9,631.61 and 1,978.66
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.