Home / 28,439.79-42,660.30-8,717.91

Finding the Fourth Proportional to 28,439.79, 42,660.30 and 8,717.91

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Solution

The fourth proportional to 28,439.79, 42,660.30 and 8,717.91 is: 13,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.79 : 42,660.30 = 8,717.91 : x
  2. Step 2: Convert to fraction form
    28,439.79/42,660.30 = 8,717.91/x
  3. Step 3: Cross multiply
    28,439.79x = 42,660.30 × 8,717.91
  4. Step 4: Simplify right side
    28,439.79x = 371,908,655.97
  5. Step 5: Solve for x
    x = 371,908,655.97/28,439.79
  6. Step 6: Final answer
    x = 13,077.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.