Home / 21,218.36-31,831.46-6,987.64

Finding the Fourth Proportional to 21,218.36, 31,831.46 and 6,987.64

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Solution

The fourth proportional to 21,218.36, 31,831.46 and 6,987.64 is: 10,482.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.36 : 31,831.46 = 6,987.64 : x
  2. Step 2: Convert to fraction form
    21,218.36/31,831.46 = 6,987.64/x
  3. Step 3: Cross multiply
    21,218.36x = 31,831.46 × 6,987.64
  4. Step 4: Simplify right side
    21,218.36x = 222,426,667.18
  5. Step 5: Solve for x
    x = 222,426,667.18/21,218.36
  6. Step 6: Final answer
    x = 10,482.74

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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.