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Finding the Fourth Proportional to 27,712, 38,242.77 and 15,136.75

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Solution

The fourth proportional to 27,712, 38,242.77 and 15,136.75 is: 20,888.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,712 : 38,242.77 = 15,136.75 : x
  2. Step 2: Convert to fraction form
    27,712/38,242.77 = 15,136.75/x
  3. Step 3: Cross multiply
    27,712x = 38,242.77 × 15,136.75
  4. Step 4: Simplify right side
    27,712x = 578,871,248.80
  5. Step 5: Solve for x
    x = 578,871,248.80/27,712
  6. Step 6: Final answer
    x = 20,888.83

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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.