Home / 21,331.02-31,982.80-8,859.64

Finding the Fourth Proportional to 21,331.02, 31,982.80 and 8,859.64

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Solution

The fourth proportional to 21,331.02, 31,982.80 and 8,859.64 is: 13,283.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.02 : 31,982.80 = 8,859.64 : x
  2. Step 2: Convert to fraction form
    21,331.02/31,982.80 = 8,859.64/x
  3. Step 3: Cross multiply
    21,331.02x = 31,982.80 × 8,859.64
  4. Step 4: Simplify right side
    21,331.02x = 283,356,094.19
  5. Step 5: Solve for x
    x = 283,356,094.19/21,331.02
  6. Step 6: Final answer
    x = 13,283.76

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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.