Home / 20,971.69-31,488.51-13,995.16

Finding the Fourth Proportional to 20,971.69, 31,488.51 and 13,995.16

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Solution

The fourth proportional to 20,971.69, 31,488.51 and 13,995.16 is: 21,013.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.69 : 31,488.51 = 13,995.16 : x
  2. Step 2: Convert to fraction form
    20,971.69/31,488.51 = 13,995.16/x
  3. Step 3: Cross multiply
    20,971.69x = 31,488.51 × 13,995.16
  4. Step 4: Simplify right side
    20,971.69x = 440,686,735.61
  5. Step 5: Solve for x
    x = 440,686,735.61/20,971.69
  6. Step 6: Final answer
    x = 21,013.41

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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.