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Finding the Fourth Proportional to 15,601.56, 21,530.16 and 8,528

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Solution

The fourth proportional to 15,601.56, 21,530.16 and 8,528 is: 11,768.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,601.56 : 21,530.16 = 8,528 : x
  2. Step 2: Convert to fraction form
    15,601.56/21,530.16 = 8,528/x
  3. Step 3: Cross multiply
    15,601.56x = 21,530.16 × 8,528
  4. Step 4: Simplify right side
    15,601.56x = 183,609,204.48
  5. Step 5: Solve for x
    x = 183,609,204.48/15,601.56
  6. Step 6: Final answer
    x = 11,768.64

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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.