Home / 21,985.36-32,979.60-7,953.70

Finding the Fourth Proportional to 21,985.36, 32,979.60 and 7,953.70

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Solution

The fourth proportional to 21,985.36, 32,979.60 and 7,953.70 is: 11,931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.36 : 32,979.60 = 7,953.70 : x
  2. Step 2: Convert to fraction form
    21,985.36/32,979.60 = 7,953.70/x
  3. Step 3: Cross multiply
    21,985.36x = 32,979.60 × 7,953.70
  4. Step 4: Simplify right side
    21,985.36x = 262,309,844.52
  5. Step 5: Solve for x
    x = 262,309,844.52/21,985.36
  6. Step 6: Final answer
    x = 11,931.11

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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.