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Finding the Fourth Proportional to 28,538.88, 39,384.72 and 15,963.72

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Solution

The fourth proportional to 28,538.88, 39,384.72 and 15,963.72 is: 22,030.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.88 : 39,384.72 = 15,963.72 : x
  2. Step 2: Convert to fraction form
    28,538.88/39,384.72 = 15,963.72/x
  3. Step 3: Cross multiply
    28,538.88x = 39,384.72 × 15,963.72
  4. Step 4: Simplify right side
    28,538.88x = 628,726,642.36
  5. Step 5: Solve for x
    x = 628,726,642.36/28,538.88
  6. Step 6: Final answer
    x = 22,030.53

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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.