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Finding the Fourth Proportional to 21,689.16, 32,538.80 and 8,364.12

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Solution

The fourth proportional to 21,689.16, 32,538.80 and 8,364.12 is: 12,548.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.16 : 32,538.80 = 8,364.12 : x
  2. Step 2: Convert to fraction form
    21,689.16/32,538.80 = 8,364.12/x
  3. Step 3: Cross multiply
    21,689.16x = 32,538.80 × 8,364.12
  4. Step 4: Simplify right side
    21,689.16x = 272,158,427.86
  5. Step 5: Solve for x
    x = 272,158,427.86/21,689.16
  6. Step 6: Final answer
    x = 12,548.13

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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.