Home / 21,003.62-28,985.22-11,572.52

Finding the Fourth Proportional to 21,003.62, 28,985.22 and 11,572.52

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Solution

The fourth proportional to 21,003.62, 28,985.22 and 11,572.52 is: 15,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.62 : 28,985.22 = 11,572.52 : x
  2. Step 2: Convert to fraction form
    21,003.62/28,985.22 = 11,572.52/x
  3. Step 3: Cross multiply
    21,003.62x = 28,985.22 × 11,572.52
  4. Step 4: Simplify right side
    21,003.62x = 335,432,038.15
  5. Step 5: Solve for x
    x = 335,432,038.15/21,003.62
  6. Step 6: Final answer
    x = 15,970.20

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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.