Home / 5,165.86-7,128.80-2,927.72

Finding the Fourth Proportional to 5,165.86, 7,128.80 and 2,927.72

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Solution

The fourth proportional to 5,165.86, 7,128.80 and 2,927.72 is: 4,040.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.86 : 7,128.80 = 2,927.72 : x
  2. Step 2: Convert to fraction form
    5,165.86/7,128.80 = 2,927.72/x
  3. Step 3: Cross multiply
    5,165.86x = 7,128.80 × 2,927.72
  4. Step 4: Simplify right side
    5,165.86x = 20,871,130.34
  5. Step 5: Solve for x
    x = 20,871,130.34/5,165.86
  6. Step 6: Final answer
    x = 4,040.20

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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.