Home / 21,136.77-29,166.76-12,637.20

Finding the Fourth Proportional to 21,136.77, 29,166.76 and 12,637.20

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Solution

The fourth proportional to 21,136.77, 29,166.76 and 12,637.20 is: 17,438.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.77 : 29,166.76 = 12,637.20 : x
  2. Step 2: Convert to fraction form
    21,136.77/29,166.76 = 12,637.20/x
  3. Step 3: Cross multiply
    21,136.77x = 29,166.76 × 12,637.20
  4. Step 4: Simplify right side
    21,136.77x = 368,586,179.47
  5. Step 5: Solve for x
    x = 368,586,179.47/21,136.77
  6. Step 6: Final answer
    x = 17,438.15

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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.