Home / 8,223.95-11,345.20-5,390.57

Finding the Fourth Proportional to 8,223.95, 11,345.20 and 5,390.57

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Solution

The fourth proportional to 8,223.95, 11,345.20 and 5,390.57 is: 7,436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,223.95 : 11,345.20 = 5,390.57 : x
  2. Step 2: Convert to fraction form
    8,223.95/11,345.20 = 5,390.57/x
  3. Step 3: Cross multiply
    8,223.95x = 11,345.20 × 5,390.57
  4. Step 4: Simplify right side
    8,223.95x = 61,157,011.09
  5. Step 5: Solve for x
    x = 61,157,011.09/8,223.95
  6. Step 6: Final answer
    x = 7,436.46

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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.