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Finding the Fourth Proportional to 21,832.70, 32,700.45 and 18,916.70

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Solution

The fourth proportional to 21,832.70, 32,700.45 and 18,916.70 is: 28,332.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,832.70 : 32,700.45 = 18,916.70 : x
  2. Step 2: Convert to fraction form
    21,832.70/32,700.45 = 18,916.70/x
  3. Step 3: Cross multiply
    21,832.70x = 32,700.45 × 18,916.70
  4. Step 4: Simplify right side
    21,832.70x = 618,584,602.52
  5. Step 5: Solve for x
    x = 618,584,602.52/21,832.70
  6. Step 6: Final answer
    x = 28,332.94

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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.