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Finding the Fourth Proportional to 15,287.17, 21,096.52 and 8,913.59

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Solution

The fourth proportional to 15,287.17, 21,096.52 and 8,913.59 is: 12,300.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,287.17 : 21,096.52 = 8,913.59 : x
  2. Step 2: Convert to fraction form
    15,287.17/21,096.52 = 8,913.59/x
  3. Step 3: Cross multiply
    15,287.17x = 21,096.52 × 8,913.59
  4. Step 4: Simplify right side
    15,287.17x = 188,045,729.71
  5. Step 5: Solve for x
    x = 188,045,729.71/15,287.17
  6. Step 6: Final answer
    x = 12,300.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.