Home / 21,217.32-31,831.39-9,970.48

Finding the Fourth Proportional to 21,217.32, 31,831.39 and 9,970.48

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Solution

The fourth proportional to 21,217.32, 31,831.39 and 9,970.48 is: 14,958.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.32 : 31,831.39 = 9,970.48 : x
  2. Step 2: Convert to fraction form
    21,217.32/31,831.39 = 9,970.48/x
  3. Step 3: Cross multiply
    21,217.32x = 31,831.39 × 9,970.48
  4. Step 4: Simplify right side
    21,217.32x = 317,374,155.74
  5. Step 5: Solve for x
    x = 317,374,155.74/21,217.32
  6. Step 6: Final answer
    x = 14,958.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.