Home / 15,403.04-21,255.84-9,115.52

Finding the Fourth Proportional to 15,403.04, 21,255.84 and 9,115.52

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Solution

The fourth proportional to 15,403.04, 21,255.84 and 9,115.52 is: 12,579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.04 : 21,255.84 = 9,115.52 : x
  2. Step 2: Convert to fraction form
    15,403.04/21,255.84 = 9,115.52/x
  3. Step 3: Cross multiply
    15,403.04x = 21,255.84 × 9,115.52
  4. Step 4: Simplify right side
    15,403.04x = 193,758,034.64
  5. Step 5: Solve for x
    x = 193,758,034.64/15,403.04
  6. Step 6: Final answer
    x = 12,579.21

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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.