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Finding the Fourth Proportional to 15,911.76, 23,851.02 and 5,378.13

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Solution

The fourth proportional to 15,911.76, 23,851.02 and 5,378.13 is: 8,061.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.76 : 23,851.02 = 5,378.13 : x
  2. Step 2: Convert to fraction form
    15,911.76/23,851.02 = 5,378.13/x
  3. Step 3: Cross multiply
    15,911.76x = 23,851.02 × 5,378.13
  4. Step 4: Simplify right side
    15,911.76x = 128,273,886.19
  5. Step 5: Solve for x
    x = 128,273,886.19/15,911.76
  6. Step 6: Final answer
    x = 8,061.58

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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.