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Finding the Fourth Proportional to 11,915.63, 17,878.40 and 5,248.71

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Solution

The fourth proportional to 11,915.63, 17,878.40 and 5,248.71 is: 7,875.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.63 : 17,878.40 = 5,248.71 : x
  2. Step 2: Convert to fraction form
    11,915.63/17,878.40 = 5,248.71/x
  3. Step 3: Cross multiply
    11,915.63x = 17,878.40 × 5,248.71
  4. Step 4: Simplify right side
    11,915.63x = 93,838,510.62
  5. Step 5: Solve for x
    x = 93,838,510.62/11,915.63
  6. Step 6: Final answer
    x = 7,875.25

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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.