Home / 28,349.12-39,121.28-15,773.76

Finding the Fourth Proportional to 28,349.12, 39,121.28 and 15,773.76

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Solution

The fourth proportional to 28,349.12, 39,121.28 and 15,773.76 is: 21,767.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,349.12 : 39,121.28 = 15,773.76 : x
  2. Step 2: Convert to fraction form
    28,349.12/39,121.28 = 15,773.76/x
  3. Step 3: Cross multiply
    28,349.12x = 39,121.28 × 15,773.76
  4. Step 4: Simplify right side
    28,349.12x = 617,089,681.61
  5. Step 5: Solve for x
    x = 617,089,681.61/28,349.12
  6. Step 6: Final answer
    x = 21,767.51

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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.