Home / 31,041.32-42,831.36-20,283.36

Finding the Fourth Proportional to 31,041.32, 42,831.36 and 20,283.36

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Solution

The fourth proportional to 31,041.32, 42,831.36 and 20,283.36 is: 27,987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,041.32 : 42,831.36 = 20,283.36 : x
  2. Step 2: Convert to fraction form
    31,041.32/42,831.36 = 20,283.36/x
  3. Step 3: Cross multiply
    31,041.32x = 42,831.36 × 20,283.36
  4. Step 4: Simplify right side
    31,041.32x = 868,763,894.17
  5. Step 5: Solve for x
    x = 868,763,894.17/31,041.32
  6. Step 6: Final answer
    x = 27,987.34

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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.