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Finding the Fourth Proportional to 40,893.70, 61,340.55 and 21,178.30

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Solution

The fourth proportional to 40,893.70, 61,340.55 and 21,178.30 is: 31,767.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,893.70 : 61,340.55 = 21,178.30 : x
  2. Step 2: Convert to fraction form
    40,893.70/61,340.55 = 21,178.30/x
  3. Step 3: Cross multiply
    40,893.70x = 61,340.55 × 21,178.30
  4. Step 4: Simplify right side
    40,893.70x = 1,299,088,570.07
  5. Step 5: Solve for x
    x = 1,299,088,570.07/40,893.70
  6. Step 6: Final answer
    x = 31,767.45

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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.