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Finding the Fourth Proportional to 7,221.43, 9,973.80 and 4,859.47

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Solution

The fourth proportional to 7,221.43, 9,973.80 and 4,859.47 is: 6,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.43 : 9,973.80 = 4,859.47 : x
  2. Step 2: Convert to fraction form
    7,221.43/9,973.80 = 4,859.47/x
  3. Step 3: Cross multiply
    7,221.43x = 9,973.80 × 4,859.47
  4. Step 4: Simplify right side
    7,221.43x = 48,467,381.89
  5. Step 5: Solve for x
    x = 48,467,381.89/7,221.43
  6. Step 6: Final answer
    x = 6,711.60

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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.