Home / 9,420.59-13,000.65-5,172.07

Finding the Fourth Proportional to 9,420.59, 13,000.65 and 5,172.07

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Solution

The fourth proportional to 9,420.59, 13,000.65 and 5,172.07 is: 7,137.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.59 : 13,000.65 = 5,172.07 : x
  2. Step 2: Convert to fraction form
    9,420.59/13,000.65 = 5,172.07/x
  3. Step 3: Cross multiply
    9,420.59x = 13,000.65 × 5,172.07
  4. Step 4: Simplify right side
    9,420.59x = 67,240,271.85
  5. Step 5: Solve for x
    x = 67,240,271.85/9,420.59
  6. Step 6: Final answer
    x = 7,137.59

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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.