Home / 10,931.78-15,087.02-6,685.32

Finding the Fourth Proportional to 10,931.78, 15,087.02 and 6,685.32

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Solution

The fourth proportional to 10,931.78, 15,087.02 and 6,685.32 is: 9,226.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.78 : 15,087.02 = 6,685.32 : x
  2. Step 2: Convert to fraction form
    10,931.78/15,087.02 = 6,685.32/x
  3. Step 3: Cross multiply
    10,931.78x = 15,087.02 × 6,685.32
  4. Step 4: Simplify right side
    10,931.78x = 100,861,560.84
  5. Step 5: Solve for x
    x = 100,861,560.84/10,931.78
  6. Step 6: Final answer
    x = 9,226.46

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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.