Home / 31,637.50-43,660.47-20,478.94

Finding the Fourth Proportional to 31,637.50, 43,660.47 and 20,478.94

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Solution

The fourth proportional to 31,637.50, 43,660.47 and 20,478.94 is: 28,261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,637.50 : 43,660.47 = 20,478.94 : x
  2. Step 2: Convert to fraction form
    31,637.50/43,660.47 = 20,478.94/x
  3. Step 3: Cross multiply
    31,637.50x = 43,660.47 × 20,478.94
  4. Step 4: Simplify right side
    31,637.50x = 894,120,145.50
  5. Step 5: Solve for x
    x = 894,120,145.50/31,637.50
  6. Step 6: Final answer
    x = 28,261.40

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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.