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Finding the Fourth Proportional to 26,931.39, 40,406.80 and 9,403.80

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Solution

The fourth proportional to 26,931.39, 40,406.80 and 9,403.80 is: 14,109.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,931.39 : 40,406.80 = 9,403.80 : x
  2. Step 2: Convert to fraction form
    26,931.39/40,406.80 = 9,403.80/x
  3. Step 3: Cross multiply
    26,931.39x = 40,406.80 × 9,403.80
  4. Step 4: Simplify right side
    26,931.39x = 379,977,263.81
  5. Step 5: Solve for x
    x = 379,977,263.81/26,931.39
  6. Step 6: Final answer
    x = 14,109.09

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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.