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Finding the Fourth Proportional to 9,915.99, 14,869.54 and 7,131.00

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Solution

The fourth proportional to 9,915.99, 14,869.54 and 7,131.00 is: 10,693.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.99 : 14,869.54 = 7,131.00 : x
  2. Step 2: Convert to fraction form
    9,915.99/14,869.54 = 7,131.00/x
  3. Step 3: Cross multiply
    9,915.99x = 14,869.54 × 7,131.00
  4. Step 4: Simplify right side
    9,915.99x = 106,034,754.41
  5. Step 5: Solve for x
    x = 106,034,754.41/9,915.99
  6. Step 6: Final answer
    x = 10,693.31

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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.