Home / 20,642.28-28,486-11,210.80

Finding the Fourth Proportional to 20,642.28, 28,486 and 11,210.80

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Solution

The fourth proportional to 20,642.28, 28,486 and 11,210.80 is: 15,470.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.28 : 28,486 = 11,210.80 : x
  2. Step 2: Convert to fraction form
    20,642.28/28,486 = 11,210.80/x
  3. Step 3: Cross multiply
    20,642.28x = 28,486 × 11,210.80
  4. Step 4: Simplify right side
    20,642.28x = 319,350,848.80
  5. Step 5: Solve for x
    x = 319,350,848.80/20,642.28
  6. Step 6: Final answer
    x = 15,470.72

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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.