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Finding the Fourth Proportional to 28,430.70, 42,646.01 and 7,654.22

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Solution

The fourth proportional to 28,430.70, 42,646.01 and 7,654.22 is: 11,481.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.70 : 42,646.01 = 7,654.22 : x
  2. Step 2: Convert to fraction form
    28,430.70/42,646.01 = 7,654.22/x
  3. Step 3: Cross multiply
    28,430.70x = 42,646.01 × 7,654.22
  4. Step 4: Simplify right side
    28,430.70x = 326,421,942.66
  5. Step 5: Solve for x
    x = 326,421,942.66/28,430.70
  6. Step 6: Final answer
    x = 11,481.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.