Home / 10,355.28-14,290.47-5,639.55

Finding the Fourth Proportional to 10,355.28, 14,290.47 and 5,639.55

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Solution

The fourth proportional to 10,355.28, 14,290.47 and 5,639.55 is: 7,782.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,355.28 : 14,290.47 = 5,639.55 : x
  2. Step 2: Convert to fraction form
    10,355.28/14,290.47 = 5,639.55/x
  3. Step 3: Cross multiply
    10,355.28x = 14,290.47 × 5,639.55
  4. Step 4: Simplify right side
    10,355.28x = 80,591,820.09
  5. Step 5: Solve for x
    x = 80,591,820.09/10,355.28
  6. Step 6: Final answer
    x = 7,782.68

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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.