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Finding the Fourth Proportional to 28,016.60, 42,024.90 and 7,240.10

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Solution

The fourth proportional to 28,016.60, 42,024.90 and 7,240.10 is: 10,860.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,016.60 : 42,024.90 = 7,240.10 : x
  2. Step 2: Convert to fraction form
    28,016.60/42,024.90 = 7,240.10/x
  3. Step 3: Cross multiply
    28,016.60x = 42,024.90 × 7,240.10
  4. Step 4: Simplify right side
    28,016.60x = 304,264,478.49
  5. Step 5: Solve for x
    x = 304,264,478.49/28,016.60
  6. Step 6: Final answer
    x = 10,860.15

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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.