Home / 31,572.91-43,560.45-20,964.64

Finding the Fourth Proportional to 31,572.91, 43,560.45 and 20,964.64

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Solution

The fourth proportional to 31,572.91, 43,560.45 and 20,964.64 is: 28,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,572.91 : 43,560.45 = 20,964.64 : x
  2. Step 2: Convert to fraction form
    31,572.91/43,560.45 = 20,964.64/x
  3. Step 3: Cross multiply
    31,572.91x = 43,560.45 × 20,964.64
  4. Step 4: Simplify right side
    31,572.91x = 913,229,152.49
  5. Step 5: Solve for x
    x = 913,229,152.49/31,572.91
  6. Step 6: Final answer
    x = 28,924.45

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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.