Home / 31,445.10-47,204.10-18,979.20

Finding the Fourth Proportional to 31,445.10, 47,204.10 and 18,979.20

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Solution

The fourth proportional to 31,445.10, 47,204.10 and 18,979.20 is: 28,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,445.10 : 47,204.10 = 18,979.20 : x
  2. Step 2: Convert to fraction form
    31,445.10/47,204.10 = 18,979.20/x
  3. Step 3: Cross multiply
    31,445.10x = 47,204.10 × 18,979.20
  4. Step 4: Simplify right side
    31,445.10x = 895,896,054.72
  5. Step 5: Solve for x
    x = 895,896,054.72/31,445.10
  6. Step 6: Final answer
    x = 28,490.80

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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.