Home / 21,287.34-31,931.01-5,703.75

Finding the Fourth Proportional to 21,287.34, 31,931.01 and 5,703.75

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Solution

The fourth proportional to 21,287.34, 31,931.01 and 5,703.75 is: 8,555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.34 : 31,931.01 = 5,703.75 : x
  2. Step 2: Convert to fraction form
    21,287.34/31,931.01 = 5,703.75/x
  3. Step 3: Cross multiply
    21,287.34x = 31,931.01 × 5,703.75
  4. Step 4: Simplify right side
    21,287.34x = 182,126,498.29
  5. Step 5: Solve for x
    x = 182,126,498.29/21,287.34
  6. Step 6: Final answer
    x = 8,555.63

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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.