Home / 20,499.92-28,290-11,547.60

Finding the Fourth Proportional to 20,499.92, 28,290 and 11,547.60

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Solution

The fourth proportional to 20,499.92, 28,290 and 11,547.60 is: 15,935.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.92 : 28,290 = 11,547.60 : x
  2. Step 2: Convert to fraction form
    20,499.92/28,290 = 11,547.60/x
  3. Step 3: Cross multiply
    20,499.92x = 28,290 × 11,547.60
  4. Step 4: Simplify right side
    20,499.92x = 326,681,604
  5. Step 5: Solve for x
    x = 326,681,604/20,499.92
  6. Step 6: Final answer
    x = 15,935.75

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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.