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Finding the Fourth Proportional to 28,657.98, 42,908.00 and 21,616.68

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Solution

The fourth proportional to 28,657.98, 42,908.00 and 21,616.68 is: 32,365.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.98 : 42,908.00 = 21,616.68 : x
  2. Step 2: Convert to fraction form
    28,657.98/42,908.00 = 21,616.68/x
  3. Step 3: Cross multiply
    28,657.98x = 42,908.00 × 21,616.68
  4. Step 4: Simplify right side
    28,657.98x = 927,528,397.36
  5. Step 5: Solve for x
    x = 927,528,397.36/28,657.98
  6. Step 6: Final answer
    x = 32,365.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.