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Finding the Fourth Proportional to 28,762.16, 39,691.40 and 16,015

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Solution

The fourth proportional to 28,762.16, 39,691.40 and 16,015 is: 22,100.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,762.16 : 39,691.40 = 16,015 : x
  2. Step 2: Convert to fraction form
    28,762.16/39,691.40 = 16,015/x
  3. Step 3: Cross multiply
    28,762.16x = 39,691.40 × 16,015
  4. Step 4: Simplify right side
    28,762.16x = 635,657,771
  5. Step 5: Solve for x
    x = 635,657,771/28,762.16
  6. Step 6: Final answer
    x = 22,100.49

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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.