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Finding the Fourth Proportional to 15,309.40, 22,988.40 and 10,400.80

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Solution

The fourth proportional to 15,309.40, 22,988.40 and 10,400.80 is: 15,617.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.40 : 22,988.40 = 10,400.80 : x
  2. Step 2: Convert to fraction form
    15,309.40/22,988.40 = 10,400.80/x
  3. Step 3: Cross multiply
    15,309.40x = 22,988.40 × 10,400.80
  4. Step 4: Simplify right side
    15,309.40x = 239,097,750.72
  5. Step 5: Solve for x
    x = 239,097,750.72/15,309.40
  6. Step 6: Final answer
    x = 15,617.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.