Home / 42,573.40-63,869.38-12,990.44

Finding the Fourth Proportional to 42,573.40, 63,869.38 and 12,990.44

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Solution

The fourth proportional to 42,573.40, 63,869.38 and 12,990.44 is: 19,488.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,573.40 : 63,869.38 = 12,990.44 : x
  2. Step 2: Convert to fraction form
    42,573.40/63,869.38 = 12,990.44/x
  3. Step 3: Cross multiply
    42,573.40x = 63,869.38 × 12,990.44
  4. Step 4: Simplify right side
    42,573.40x = 829,691,475.92
  5. Step 5: Solve for x
    x = 829,691,475.92/42,573.40
  6. Step 6: Final answer
    x = 19,488.50

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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.