Home / 10,387.20-14,334.64-5,671.78

Finding the Fourth Proportional to 10,387.20, 14,334.64 and 5,671.78

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Solution

The fourth proportional to 10,387.20, 14,334.64 and 5,671.78 is: 7,827.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.20 : 14,334.64 = 5,671.78 : x
  2. Step 2: Convert to fraction form
    10,387.20/14,334.64 = 5,671.78/x
  3. Step 3: Cross multiply
    10,387.20x = 14,334.64 × 5,671.78
  4. Step 4: Simplify right side
    10,387.20x = 81,302,924.46
  5. Step 5: Solve for x
    x = 81,302,924.46/10,387.20
  6. Step 6: Final answer
    x = 7,827.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.