Home / 15,814.80-21,831.40-9,443.60

Finding the Fourth Proportional to 15,814.80, 21,831.40 and 9,443.60

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Solution

The fourth proportional to 15,814.80, 21,831.40 and 9,443.60 is: 13,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,814.80 : 21,831.40 = 9,443.60 : x
  2. Step 2: Convert to fraction form
    15,814.80/21,831.40 = 9,443.60/x
  3. Step 3: Cross multiply
    15,814.80x = 21,831.40 × 9,443.60
  4. Step 4: Simplify right side
    15,814.80x = 206,167,009.04
  5. Step 5: Solve for x
    x = 206,167,009.04/15,814.80
  6. Step 6: Final answer
    x = 13,036.33

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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.