Home / 21,979.04-32,973.36-12,113.20

Finding the Fourth Proportional to 21,979.04, 32,973.36 and 12,113.20

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Solution

The fourth proportional to 21,979.04, 32,973.36 and 12,113.20 is: 18,172.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.04 : 32,973.36 = 12,113.20 : x
  2. Step 2: Convert to fraction form
    21,979.04/32,973.36 = 12,113.20/x
  3. Step 3: Cross multiply
    21,979.04x = 32,973.36 × 12,113.20
  4. Step 4: Simplify right side
    21,979.04x = 399,412,904.35
  5. Step 5: Solve for x
    x = 399,412,904.35/21,979.04
  6. Step 6: Final answer
    x = 18,172.45

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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.