Home / 21,983.04-32,979.36-12,117.20

Finding the Fourth Proportional to 21,983.04, 32,979.36 and 12,117.20

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Solution

The fourth proportional to 21,983.04, 32,979.36 and 12,117.20 is: 18,178.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.04 : 32,979.36 = 12,117.20 : x
  2. Step 2: Convert to fraction form
    21,983.04/32,979.36 = 12,117.20/x
  3. Step 3: Cross multiply
    21,983.04x = 32,979.36 × 12,117.20
  4. Step 4: Simplify right side
    21,983.04x = 399,617,500.99
  5. Step 5: Solve for x
    x = 399,617,500.99/21,983.04
  6. Step 6: Final answer
    x = 18,178.45

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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.