Home / 10,421.55-14,386.41-6,649.77

Finding the Fourth Proportional to 10,421.55, 14,386.41 and 6,649.77

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Solution

The fourth proportional to 10,421.55, 14,386.41 and 6,649.77 is: 9,179.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.55 : 14,386.41 = 6,649.77 : x
  2. Step 2: Convert to fraction form
    10,421.55/14,386.41 = 6,649.77/x
  3. Step 3: Cross multiply
    10,421.55x = 14,386.41 × 6,649.77
  4. Step 4: Simplify right side
    10,421.55x = 95,666,317.63
  5. Step 5: Solve for x
    x = 95,666,317.63/10,421.55
  6. Step 6: Final answer
    x = 9,179.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.