Home / 19,781,135.80-29,671,703.70-12,128,385.40

Finding the Fourth Proportional to 19,781,135.80, 29,671,703.70 and 12,128,385.40

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Solution

The fourth proportional to 19,781,135.80, 29,671,703.70 and 12,128,385.40 is: 18,192,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781,135.80 : 29,671,703.70 = 12,128,385.40 : x
  2. Step 2: Convert to fraction form
    19,781,135.80/29,671,703.70 = 12,128,385.40/x
  3. Step 3: Cross multiply
    19,781,135.80x = 29,671,703.70 × 12,128,385.40
  4. Step 4: Simplify right side
    19,781,135.80x = 359,869,857,948,206
  5. Step 5: Solve for x
    x = 359,869,857,948,206/19,781,135.80
  6. Step 6: Final answer
    x = 18,192,578.10

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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.