Home / 72,013.18-108,018.49-19,428.22

Finding the Fourth Proportional to 72,013.18, 108,018.49 and 19,428.22

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Solution

The fourth proportional to 72,013.18, 108,018.49 and 19,428.22 is: 29,141.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,013.18 : 108,018.49 = 19,428.22 : x
  2. Step 2: Convert to fraction form
    72,013.18/108,018.49 = 19,428.22/x
  3. Step 3: Cross multiply
    72,013.18x = 108,018.49 × 19,428.22
  4. Step 4: Simplify right side
    72,013.18x = 2,098,606,987.79
  5. Step 5: Solve for x
    x = 2,098,606,987.79/72,013.18
  6. Step 6: Final answer
    x = 29,141.98

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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.