Home / 7,124.61-9,831.91-3,938.01

Finding the Fourth Proportional to 7,124.61, 9,831.91 and 3,938.01

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Solution

The fourth proportional to 7,124.61, 9,831.91 and 3,938.01 is: 5,434.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.61 : 9,831.91 = 3,938.01 : x
  2. Step 2: Convert to fraction form
    7,124.61/9,831.91 = 3,938.01/x
  3. Step 3: Cross multiply
    7,124.61x = 9,831.91 × 3,938.01
  4. Step 4: Simplify right side
    7,124.61x = 38,718,159.90
  5. Step 5: Solve for x
    x = 38,718,159.90/7,124.61
  6. Step 6: Final answer
    x = 5,434.43

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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.