Home / 21,342.16-31,971.66-13,001.49

Finding the Fourth Proportional to 21,342.16, 31,971.66 and 13,001.49

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Solution

The fourth proportional to 21,342.16, 31,971.66 and 13,001.49 is: 19,476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.16 : 31,971.66 = 13,001.49 : x
  2. Step 2: Convert to fraction form
    21,342.16/31,971.66 = 13,001.49/x
  3. Step 3: Cross multiply
    21,342.16x = 31,971.66 × 13,001.49
  4. Step 4: Simplify right side
    21,342.16x = 415,679,152.23
  5. Step 5: Solve for x
    x = 415,679,152.23/21,342.16
  6. Step 6: Final answer
    x = 19,476.90

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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.