Home / 20,565.81-30,829.28-18,680.13

Finding the Fourth Proportional to 20,565.81, 30,829.28 and 18,680.13

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Solution

The fourth proportional to 20,565.81, 30,829.28 and 18,680.13 is: 28,002.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.81 : 30,829.28 = 18,680.13 : x
  2. Step 2: Convert to fraction form
    20,565.81/30,829.28 = 18,680.13/x
  3. Step 3: Cross multiply
    20,565.81x = 30,829.28 × 18,680.13
  4. Step 4: Simplify right side
    20,565.81x = 575,894,864.81
  5. Step 5: Solve for x
    x = 575,894,864.81/20,565.81
  6. Step 6: Final answer
    x = 28,002.54

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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.