Home / 28,324.90-42,447.12-20,870.74

Finding the Fourth Proportional to 28,324.90, 42,447.12 and 20,870.74

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Solution

The fourth proportional to 28,324.90, 42,447.12 and 20,870.74 is: 31,276.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,324.90 : 42,447.12 = 20,870.74 : x
  2. Step 2: Convert to fraction form
    28,324.90/42,447.12 = 20,870.74/x
  3. Step 3: Cross multiply
    28,324.90x = 42,447.12 × 20,870.74
  4. Step 4: Simplify right side
    28,324.90x = 885,902,805.27
  5. Step 5: Solve for x
    x = 885,902,805.27/28,324.90
  6. Step 6: Final answer
    x = 31,276.47

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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.