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Finding the Fourth Proportional to 28,011, 38,655.18 and 15,436.02

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Solution

The fourth proportional to 28,011, 38,655.18 and 15,436.02 is: 21,301.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011 : 38,655.18 = 15,436.02 : x
  2. Step 2: Convert to fraction form
    28,011/38,655.18 = 15,436.02/x
  3. Step 3: Cross multiply
    28,011x = 38,655.18 × 15,436.02
  4. Step 4: Simplify right side
    28,011x = 596,682,131.58
  5. Step 5: Solve for x
    x = 596,682,131.58/28,011
  6. Step 6: Final answer
    x = 21,301.71

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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.