Home / 15,478.13-21,359.71-8,404.55

Finding the Fourth Proportional to 15,478.13, 21,359.71 and 8,404.55

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Solution

The fourth proportional to 15,478.13, 21,359.71 and 8,404.55 is: 11,598.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.13 : 21,359.71 = 8,404.55 : x
  2. Step 2: Convert to fraction form
    15,478.13/21,359.71 = 8,404.55/x
  3. Step 3: Cross multiply
    15,478.13x = 21,359.71 × 8,404.55
  4. Step 4: Simplify right side
    15,478.13x = 179,518,750.68
  5. Step 5: Solve for x
    x = 179,518,750.68/15,478.13
  6. Step 6: Final answer
    x = 11,598.22

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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.