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Finding the Fourth Proportional to 28,012, 38,656.56 and 15,437.92

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Solution

The fourth proportional to 28,012, 38,656.56 and 15,437.92 is: 21,304.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,012 : 38,656.56 = 15,437.92 : x
  2. Step 2: Convert to fraction form
    28,012/38,656.56 = 15,437.92/x
  3. Step 3: Cross multiply
    28,012x = 38,656.56 × 15,437.92
  4. Step 4: Simplify right side
    28,012x = 596,776,880.76
  5. Step 5: Solve for x
    x = 596,776,880.76/28,012
  6. Step 6: Final answer
    x = 21,304.33

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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.