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Finding the Fourth Proportional to 8,915.18, 13,360.02 and 5,011.40

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Solution

The fourth proportional to 8,915.18, 13,360.02 and 5,011.40 is: 7,509.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.18 : 13,360.02 = 5,011.40 : x
  2. Step 2: Convert to fraction form
    8,915.18/13,360.02 = 5,011.40/x
  3. Step 3: Cross multiply
    8,915.18x = 13,360.02 × 5,011.40
  4. Step 4: Simplify right side
    8,915.18x = 66,952,404.23
  5. Step 5: Solve for x
    x = 66,952,404.23/8,915.18
  6. Step 6: Final answer
    x = 7,509.93

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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.