Home / 22,831.40-31,509.60-13,399.76

Finding the Fourth Proportional to 22,831.40, 31,509.60 and 13,399.76

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Solution

The fourth proportional to 22,831.40, 31,509.60 and 13,399.76 is: 18,493.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,831.40 : 31,509.60 = 13,399.76 : x
  2. Step 2: Convert to fraction form
    22,831.40/31,509.60 = 13,399.76/x
  3. Step 3: Cross multiply
    22,831.40x = 31,509.60 × 13,399.76
  4. Step 4: Simplify right side
    22,831.40x = 422,221,077.70
  5. Step 5: Solve for x
    x = 422,221,077.70/22,831.40
  6. Step 6: Final answer
    x = 18,493.00

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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.