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Finding the Fourth Proportional to 28,444.40, 42,663.64 and 7,666.64

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Solution

The fourth proportional to 28,444.40, 42,663.64 and 7,666.64 is: 11,499.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,444.40 : 42,663.64 = 7,666.64 : x
  2. Step 2: Convert to fraction form
    28,444.40/42,663.64 = 7,666.64/x
  3. Step 3: Cross multiply
    28,444.40x = 42,663.64 × 7,666.64
  4. Step 4: Simplify right side
    28,444.40x = 327,086,768.97
  5. Step 5: Solve for x
    x = 327,086,768.97/28,444.40
  6. Step 6: Final answer
    x = 11,499.16

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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.