Home / 28,006.03-38,648.78-15,430.78

Finding the Fourth Proportional to 28,006.03, 38,648.78 and 15,430.78

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Solution

The fourth proportional to 28,006.03, 38,648.78 and 15,430.78 is: 21,294.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.03 : 38,648.78 = 15,430.78 : x
  2. Step 2: Convert to fraction form
    28,006.03/38,648.78 = 15,430.78/x
  3. Step 3: Cross multiply
    28,006.03x = 38,648.78 × 15,430.78
  4. Step 4: Simplify right side
    28,006.03x = 596,380,821.45
  5. Step 5: Solve for x
    x = 596,380,821.45/28,006.03
  6. Step 6: Final answer
    x = 21,294.73

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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.