Home / 20,916.81-28,853.15-12,528.45

Finding the Fourth Proportional to 20,916.81, 28,853.15 and 12,528.45

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Solution

The fourth proportional to 20,916.81, 28,853.15 and 12,528.45 is: 17,282.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.81 : 28,853.15 = 12,528.45 : x
  2. Step 2: Convert to fraction form
    20,916.81/28,853.15 = 12,528.45/x
  3. Step 3: Cross multiply
    20,916.81x = 28,853.15 × 12,528.45
  4. Step 4: Simplify right side
    20,916.81x = 361,485,184.48
  5. Step 5: Solve for x
    x = 361,485,184.48/20,916.81
  6. Step 6: Final answer
    x = 17,282.04

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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.