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Finding the Fourth Proportional to 22,303.88, 30,739.32 and 18,312.20

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Solution

The fourth proportional to 22,303.88, 30,739.32 and 18,312.20 is: 25,237.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,303.88 : 30,739.32 = 18,312.20 : x
  2. Step 2: Convert to fraction form
    22,303.88/30,739.32 = 18,312.20/x
  3. Step 3: Cross multiply
    22,303.88x = 30,739.32 × 18,312.20
  4. Step 4: Simplify right side
    22,303.88x = 562,904,575.70
  5. Step 5: Solve for x
    x = 562,904,575.70/22,303.88
  6. Step 6: Final answer
    x = 25,237.97

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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.