Home / 10,893.75-15,031.08-7,122.45

Finding the Fourth Proportional to 10,893.75, 15,031.08 and 7,122.45

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Solution

The fourth proportional to 10,893.75, 15,031.08 and 7,122.45 is: 9,827.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,893.75 : 15,031.08 = 7,122.45 : x
  2. Step 2: Convert to fraction form
    10,893.75/15,031.08 = 7,122.45/x
  3. Step 3: Cross multiply
    10,893.75x = 15,031.08 × 7,122.45
  4. Step 4: Simplify right side
    10,893.75x = 107,058,115.75
  5. Step 5: Solve for x
    x = 107,058,115.75/10,893.75
  6. Step 6: Final answer
    x = 9,827.48

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1.5x scale

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.