Home / 15,531.20-21,421.49-9,861.03

Finding the Fourth Proportional to 15,531.20, 21,421.49 and 9,861.03

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Solution

The fourth proportional to 15,531.20, 21,421.49 and 9,861.03 is: 13,600.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.20 : 21,421.49 = 9,861.03 : x
  2. Step 2: Convert to fraction form
    15,531.20/21,421.49 = 9,861.03/x
  3. Step 3: Cross multiply
    15,531.20x = 21,421.49 × 9,861.03
  4. Step 4: Simplify right side
    15,531.20x = 211,237,955.53
  5. Step 5: Solve for x
    x = 211,237,955.53/15,531.20
  6. Step 6: Final answer
    x = 13,600.88

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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.