Home / 20,711.64-28,582.07-11,280.21

Finding the Fourth Proportional to 20,711.64, 28,582.07 and 11,280.21

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Solution

The fourth proportional to 20,711.64, 28,582.07 and 11,280.21 is: 15,566.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.64 : 28,582.07 = 11,280.21 : x
  2. Step 2: Convert to fraction form
    20,711.64/28,582.07 = 11,280.21/x
  3. Step 3: Cross multiply
    20,711.64x = 28,582.07 × 11,280.21
  4. Step 4: Simplify right side
    20,711.64x = 322,411,588.25
  5. Step 5: Solve for x
    x = 322,411,588.25/20,711.64
  6. Step 6: Final answer
    x = 15,566.68

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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.