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Finding the Fourth Proportional to 13,959, 19,263.42 and 7,671.78

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Solution

The fourth proportional to 13,959, 19,263.42 and 7,671.78 is: 10,587.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959 : 19,263.42 = 7,671.78 : x
  2. Step 2: Convert to fraction form
    13,959/19,263.42 = 7,671.78/x
  3. Step 3: Cross multiply
    13,959x = 19,263.42 × 7,671.78
  4. Step 4: Simplify right side
    13,959x = 147,784,720.29
  5. Step 5: Solve for x
    x = 147,784,720.29/13,959
  6. Step 6: Final answer
    x = 10,587.06

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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.