Home / 10,085.40-13,920.12-6,109.02

Finding the Fourth Proportional to 10,085.40, 13,920.12 and 6,109.02

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Solution

The fourth proportional to 10,085.40, 13,920.12 and 6,109.02 is: 8,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.40 : 13,920.12 = 6,109.02 : x
  2. Step 2: Convert to fraction form
    10,085.40/13,920.12 = 6,109.02/x
  3. Step 3: Cross multiply
    10,085.40x = 13,920.12 × 6,109.02
  4. Step 4: Simplify right side
    10,085.40x = 85,038,291.48
  5. Step 5: Solve for x
    x = 85,038,291.48/10,085.40
  6. Step 6: Final answer
    x = 8,431.82

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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.