Home / 7,124.08-9,831.24-4,140.40

Finding the Fourth Proportional to 7,124.08, 9,831.24 and 4,140.40

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Solution

The fourth proportional to 7,124.08, 9,831.24 and 4,140.40 is: 5,713.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.08 : 9,831.24 = 4,140.40 : x
  2. Step 2: Convert to fraction form
    7,124.08/9,831.24 = 4,140.40/x
  3. Step 3: Cross multiply
    7,124.08x = 9,831.24 × 4,140.40
  4. Step 4: Simplify right side
    7,124.08x = 40,705,266.10
  5. Step 5: Solve for x
    x = 40,705,266.10/7,124.08
  6. Step 6: Final answer
    x = 5,713.76

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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.