Home / 22,971.36-31,700.12-12,900

Finding the Fourth Proportional to 22,971.36, 31,700.12 and 12,900

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Solution

The fourth proportional to 22,971.36, 31,700.12 and 12,900 is: 17,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,971.36 : 31,700.12 = 12,900 : x
  2. Step 2: Convert to fraction form
    22,971.36/31,700.12 = 12,900/x
  3. Step 3: Cross multiply
    22,971.36x = 31,700.12 × 12,900
  4. Step 4: Simplify right side
    22,971.36x = 408,931,548
  5. Step 5: Solve for x
    x = 408,931,548/22,971.36
  6. Step 6: Final answer
    x = 17,801.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.