Home / 31,030.68-42,831.12-18,291.26

Finding the Fourth Proportional to 31,030.68, 42,831.12 and 18,291.26

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Solution

The fourth proportional to 31,030.68, 42,831.12 and 18,291.26 is: 25,247.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,030.68 : 42,831.12 = 18,291.26 : x
  2. Step 2: Convert to fraction form
    31,030.68/42,831.12 = 18,291.26/x
  3. Step 3: Cross multiply
    31,030.68x = 42,831.12 × 18,291.26
  4. Step 4: Simplify right side
    31,030.68x = 783,434,937.86
  5. Step 5: Solve for x
    x = 783,434,937.86/31,030.68
  6. Step 6: Final answer
    x = 25,247.11

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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.