Home / 12,947.78-17,871.63-8,476.58

Finding the Fourth Proportional to 12,947.78, 17,871.63 and 8,476.58

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Solution

The fourth proportional to 12,947.78, 17,871.63 and 8,476.58 is: 11,700.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.78 : 17,871.63 = 8,476.58 : x
  2. Step 2: Convert to fraction form
    12,947.78/17,871.63 = 8,476.58/x
  3. Step 3: Cross multiply
    12,947.78x = 17,871.63 × 8,476.58
  4. Step 4: Simplify right side
    12,947.78x = 151,490,301.43
  5. Step 5: Solve for x
    x = 151,490,301.43/12,947.78
  6. Step 6: Final answer
    x = 11,700.10

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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.