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Finding the Fourth Proportional to 14,289.47, 19,719.02 and 7,915.81

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Solution

The fourth proportional to 14,289.47, 19,719.02 and 7,915.81 is: 10,923.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.47 : 19,719.02 = 7,915.81 : x
  2. Step 2: Convert to fraction form
    14,289.47/19,719.02 = 7,915.81/x
  3. Step 3: Cross multiply
    14,289.47x = 19,719.02 × 7,915.81
  4. Step 4: Simplify right side
    14,289.47x = 156,091,917.11
  5. Step 5: Solve for x
    x = 156,091,917.11/14,289.47
  6. Step 6: Final answer
    x = 10,923.56

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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.