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Finding the Fourth Proportional to 26,636.24, 39,931.04 and 9,991.74

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Solution

The fourth proportional to 26,636.24, 39,931.04 and 9,991.74 is: 14,978.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,636.24 : 39,931.04 = 9,991.74 : x
  2. Step 2: Convert to fraction form
    26,636.24/39,931.04 = 9,991.74/x
  3. Step 3: Cross multiply
    26,636.24x = 39,931.04 × 9,991.74
  4. Step 4: Simplify right side
    26,636.24x = 398,980,569.61
  5. Step 5: Solve for x
    x = 398,980,569.61/26,636.24
  6. Step 6: Final answer
    x = 14,978.86

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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.