Home / 12,425,343.78-17,148,478.40-7,128,977.90

Finding the Fourth Proportional to 12,425,343.78, 17,148,478.40 and 7,128,977.90

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Solution

The fourth proportional to 12,425,343.78, 17,148,478.40 and 7,128,977.90 is: 9,838,852.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425,343.78 : 17,148,478.40 = 7,128,977.90 : x
  2. Step 2: Convert to fraction form
    12,425,343.78/17,148,478.40 = 7,128,977.90/x
  3. Step 3: Cross multiply
    12,425,343.78x = 17,148,478.40 × 7,128,977.90
  4. Step 4: Simplify right side
    12,425,343.78x = 122,251,123,592,921
  5. Step 5: Solve for x
    x = 122,251,123,592,921/12,425,343.78
  6. Step 6: Final answer
    x = 9,838,852.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.