Home / 7,126.13-9,831.64-4,139.50

Finding the Fourth Proportional to 7,126.13, 9,831.64 and 4,139.50

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Solution

The fourth proportional to 7,126.13, 9,831.64 and 4,139.50 is: 5,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,126.13 : 9,831.64 = 4,139.50 : x
  2. Step 2: Convert to fraction form
    7,126.13/9,831.64 = 4,139.50/x
  3. Step 3: Cross multiply
    7,126.13x = 9,831.64 × 4,139.50
  4. Step 4: Simplify right side
    7,126.13x = 40,698,073.78
  5. Step 5: Solve for x
    x = 40,698,073.78/7,126.13
  6. Step 6: Final answer
    x = 5,711.10

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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.