Home / 20,721.09-28,598.54-12,225.29

Finding the Fourth Proportional to 20,721.09, 28,598.54 and 12,225.29

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Solution

The fourth proportional to 20,721.09, 28,598.54 and 12,225.29 is: 16,872.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.09 : 28,598.54 = 12,225.29 : x
  2. Step 2: Convert to fraction form
    20,721.09/28,598.54 = 12,225.29/x
  3. Step 3: Cross multiply
    20,721.09x = 28,598.54 × 12,225.29
  4. Step 4: Simplify right side
    20,721.09x = 349,625,445.08
  5. Step 5: Solve for x
    x = 349,625,445.08/20,721.09
  6. Step 6: Final answer
    x = 16,872.93

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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.