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Finding the Fourth Proportional to 13,881.52, 19,158.51 and 7,913.76

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Solution

The fourth proportional to 13,881.52, 19,158.51 and 7,913.76 is: 10,922.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.52 : 19,158.51 = 7,913.76 : x
  2. Step 2: Convert to fraction form
    13,881.52/19,158.51 = 7,913.76/x
  3. Step 3: Cross multiply
    13,881.52x = 19,158.51 × 7,913.76
  4. Step 4: Simplify right side
    13,881.52x = 151,615,850.10
  5. Step 5: Solve for x
    x = 151,615,850.10/13,881.52
  6. Step 6: Final answer
    x = 10,922.14

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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.