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Finding the Fourth Proportional to 42,043.70, 63,065.28 and 12,461.70

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Solution

The fourth proportional to 42,043.70, 63,065.28 and 12,461.70 is: 18,692.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,043.70 : 63,065.28 = 12,461.70 : x
  2. Step 2: Convert to fraction form
    42,043.70/63,065.28 = 12,461.70/x
  3. Step 3: Cross multiply
    42,043.70x = 63,065.28 × 12,461.70
  4. Step 4: Simplify right side
    42,043.70x = 785,900,599.78
  5. Step 5: Solve for x
    x = 785,900,599.78/42,043.70
  6. Step 6: Final answer
    x = 18,692.47

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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.