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Finding the Fourth Proportional to 42,830.80, 64,246.20 and 18,254.80

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Solution

The fourth proportional to 42,830.80, 64,246.20 and 18,254.80 is: 27,382.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,830.80 : 64,246.20 = 18,254.80 : x
  2. Step 2: Convert to fraction form
    42,830.80/64,246.20 = 18,254.80/x
  3. Step 3: Cross multiply
    42,830.80x = 64,246.20 × 18,254.80
  4. Step 4: Simplify right side
    42,830.80x = 1,172,801,531.76
  5. Step 5: Solve for x
    x = 1,172,801,531.76/42,830.80
  6. Step 6: Final answer
    x = 27,382.20

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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.