Home / 15,829.95-21,845.56-9,116.78

Finding the Fourth Proportional to 15,829.95, 21,845.56 and 9,116.78

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Solution

The fourth proportional to 15,829.95, 21,845.56 and 9,116.78 is: 12,581.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,829.95 : 21,845.56 = 9,116.78 : x
  2. Step 2: Convert to fraction form
    15,829.95/21,845.56 = 9,116.78/x
  3. Step 3: Cross multiply
    15,829.95x = 21,845.56 × 9,116.78
  4. Step 4: Simplify right side
    15,829.95x = 199,161,164.50
  5. Step 5: Solve for x
    x = 199,161,164.50/15,829.95
  6. Step 6: Final answer
    x = 12,581.29

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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.