Home / 8,780.36-12,114.44-5,242.28

Finding the Fourth Proportional to 8,780.36, 12,114.44 and 5,242.28

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Solution

The fourth proportional to 8,780.36, 12,114.44 and 5,242.28 is: 7,232.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.36 : 12,114.44 = 5,242.28 : x
  2. Step 2: Convert to fraction form
    8,780.36/12,114.44 = 5,242.28/x
  3. Step 3: Cross multiply
    8,780.36x = 12,114.44 × 5,242.28
  4. Step 4: Simplify right side
    8,780.36x = 63,507,199.74
  5. Step 5: Solve for x
    x = 63,507,199.74/8,780.36
  6. Step 6: Final answer
    x = 7,232.87

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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.