Home / 20,031.72-30,038.40-10,669.29

Finding the Fourth Proportional to 20,031.72, 30,038.40 and 10,669.29

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Solution

The fourth proportional to 20,031.72, 30,038.40 and 10,669.29 is: 15,999.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031.72 : 30,038.40 = 10,669.29 : x
  2. Step 2: Convert to fraction form
    20,031.72/30,038.40 = 10,669.29/x
  3. Step 3: Cross multiply
    20,031.72x = 30,038.40 × 10,669.29
  4. Step 4: Simplify right side
    20,031.72x = 320,488,400.74
  5. Step 5: Solve for x
    x = 320,488,400.74/20,031.72
  6. Step 6: Final answer
    x = 15,999.05

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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.