Home / 18,715.69-28,086.90-13,798.18

Finding the Fourth Proportional to 18,715.69, 28,086.90 and 13,798.18

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Solution

The fourth proportional to 18,715.69, 28,086.90 and 13,798.18 is: 20,707.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.69 : 28,086.90 = 13,798.18 : x
  2. Step 2: Convert to fraction form
    18,715.69/28,086.90 = 13,798.18/x
  3. Step 3: Cross multiply
    18,715.69x = 28,086.90 × 13,798.18
  4. Step 4: Simplify right side
    18,715.69x = 387,547,892.42
  5. Step 5: Solve for x
    x = 387,547,892.42/18,715.69
  6. Step 6: Final answer
    x = 20,707.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.