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Finding the Fourth Proportional to 42,000.10, 63,000.15 and 18,672.10

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Solution

The fourth proportional to 42,000.10, 63,000.15 and 18,672.10 is: 28,008.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,000.10 : 63,000.15 = 18,672.10 : x
  2. Step 2: Convert to fraction form
    42,000.10/63,000.15 = 18,672.10/x
  3. Step 3: Cross multiply
    42,000.10x = 63,000.15 × 18,672.10
  4. Step 4: Simplify right side
    42,000.10x = 1,176,345,100.82
  5. Step 5: Solve for x
    x = 1,176,345,100.82/42,000.10
  6. Step 6: Final answer
    x = 28,008.15

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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.