Home / 42,391.40-63,587.10-12,813.80

Finding the Fourth Proportional to 42,391.40, 63,587.10 and 12,813.80

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Solution

The fourth proportional to 42,391.40, 63,587.10 and 12,813.80 is: 19,220.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,391.40 : 63,587.10 = 12,813.80 : x
  2. Step 2: Convert to fraction form
    42,391.40/63,587.10 = 12,813.80/x
  3. Step 3: Cross multiply
    42,391.40x = 63,587.10 × 12,813.80
  4. Step 4: Simplify right side
    42,391.40x = 814,792,381.98
  5. Step 5: Solve for x
    x = 814,792,381.98/42,391.40
  6. Step 6: Final answer
    x = 19,220.70

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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.