Home / 20,499.28-28,283.79-12,538.60

Finding the Fourth Proportional to 20,499.28, 28,283.79 and 12,538.60

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Solution

The fourth proportional to 20,499.28, 28,283.79 and 12,538.60 is: 17,300.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.28 : 28,283.79 = 12,538.60 : x
  2. Step 2: Convert to fraction form
    20,499.28/28,283.79 = 12,538.60/x
  3. Step 3: Cross multiply
    20,499.28x = 28,283.79 × 12,538.60
  4. Step 4: Simplify right side
    20,499.28x = 354,639,129.29
  5. Step 5: Solve for x
    x = 354,639,129.29/20,499.28
  6. Step 6: Final answer
    x = 17,300.08

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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.