Home / 21,979.02-32,970.05-8,831.39

Finding the Fourth Proportional to 21,979.02, 32,970.05 and 8,831.39

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Solution

The fourth proportional to 21,979.02, 32,970.05 and 8,831.39 is: 13,247.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.02 : 32,970.05 = 8,831.39 : x
  2. Step 2: Convert to fraction form
    21,979.02/32,970.05 = 8,831.39/x
  3. Step 3: Cross multiply
    21,979.02x = 32,970.05 × 8,831.39
  4. Step 4: Simplify right side
    21,979.02x = 291,171,438.22
  5. Step 5: Solve for x
    x = 291,171,438.22/21,979.02
  6. Step 6: Final answer
    x = 13,247.70

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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.