Home / 28,001.35-38,640.40-17,390.76

Finding the Fourth Proportional to 28,001.35, 38,640.40 and 17,390.76

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Solution

The fourth proportional to 28,001.35, 38,640.40 and 17,390.76 is: 23,998.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.35 : 38,640.40 = 17,390.76 : x
  2. Step 2: Convert to fraction form
    28,001.35/38,640.40 = 17,390.76/x
  3. Step 3: Cross multiply
    28,001.35x = 38,640.40 × 17,390.76
  4. Step 4: Simplify right side
    28,001.35x = 671,985,922.70
  5. Step 5: Solve for x
    x = 671,985,922.70/28,001.35
  6. Step 6: Final answer
    x = 23,998.34

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1.5x scale

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.