Home / 10,278.40-15,417.60-6,131.20

Finding the Fourth Proportional to 10,278.40, 15,417.60 and 6,131.20

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Solution

The fourth proportional to 10,278.40, 15,417.60 and 6,131.20 is: 9,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.40 : 15,417.60 = 6,131.20 : x
  2. Step 2: Convert to fraction form
    10,278.40/15,417.60 = 6,131.20/x
  3. Step 3: Cross multiply
    10,278.40x = 15,417.60 × 6,131.20
  4. Step 4: Simplify right side
    10,278.40x = 94,528,389.12
  5. Step 5: Solve for x
    x = 94,528,389.12/10,278.40
  6. Step 6: Final answer
    x = 9,196.80

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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.