Home / 21,559.65-29,752.28-12,128.22

Finding the Fourth Proportional to 21,559.65, 29,752.28 and 12,128.22

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Solution

The fourth proportional to 21,559.65, 29,752.28 and 12,128.22 is: 16,736.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.65 : 29,752.28 = 12,128.22 : x
  2. Step 2: Convert to fraction form
    21,559.65/29,752.28 = 12,128.22/x
  3. Step 3: Cross multiply
    21,559.65x = 29,752.28 × 12,128.22
  4. Step 4: Simplify right side
    21,559.65x = 360,842,136.70
  5. Step 5: Solve for x
    x = 360,842,136.70/21,559.65
  6. Step 6: Final answer
    x = 16,736.92

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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.