Home / 20,730.16-28,607.70-11,298.75

Finding the Fourth Proportional to 20,730.16, 28,607.70 and 11,298.75

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Solution

The fourth proportional to 20,730.16, 28,607.70 and 11,298.75 is: 15,592.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.16 : 28,607.70 = 11,298.75 : x
  2. Step 2: Convert to fraction form
    20,730.16/28,607.70 = 11,298.75/x
  3. Step 3: Cross multiply
    20,730.16x = 28,607.70 × 11,298.75
  4. Step 4: Simplify right side
    20,730.16x = 323,231,250.38
  5. Step 5: Solve for x
    x = 323,231,250.38/20,730.16
  6. Step 6: Final answer
    x = 15,592.32

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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.