Home / 20,712.51-28,583.82-11,281.68

Finding the Fourth Proportional to 20,712.51, 28,583.82 and 11,281.68

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Solution

The fourth proportional to 20,712.51, 28,583.82 and 11,281.68 is: 15,569.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.51 : 28,583.82 = 11,281.68 : x
  2. Step 2: Convert to fraction form
    20,712.51/28,583.82 = 11,281.68/x
  3. Step 3: Cross multiply
    20,712.51x = 28,583.82 × 11,281.68
  4. Step 4: Simplify right side
    20,712.51x = 322,473,510.42
  5. Step 5: Solve for x
    x = 322,473,510.42/20,712.51
  6. Step 6: Final answer
    x = 15,569.02

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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.