Home / 20,726.56-28,612.20-12,225.79

Finding the Fourth Proportional to 20,726.56, 28,612.20 and 12,225.79

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Solution

The fourth proportional to 20,726.56, 28,612.20 and 12,225.79 is: 16,877.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.56 : 28,612.20 = 12,225.79 : x
  2. Step 2: Convert to fraction form
    20,726.56/28,612.20 = 12,225.79/x
  3. Step 3: Cross multiply
    20,726.56x = 28,612.20 × 12,225.79
  4. Step 4: Simplify right side
    20,726.56x = 349,806,748.64
  5. Step 5: Solve for x
    x = 349,806,748.64/20,726.56
  6. Step 6: Final answer
    x = 16,877.22

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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.