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Finding the Fourth Proportional to 18,988.30, 28,482.90 and 5,840.79

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Solution

The fourth proportional to 18,988.30, 28,482.90 and 5,840.79 is: 8,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.30 : 28,482.90 = 5,840.79 : x
  2. Step 2: Convert to fraction form
    18,988.30/28,482.90 = 5,840.79/x
  3. Step 3: Cross multiply
    18,988.30x = 28,482.90 × 5,840.79
  4. Step 4: Simplify right side
    18,988.30x = 166,362,637.49
  5. Step 5: Solve for x
    x = 166,362,637.49/18,988.30
  6. Step 6: Final answer
    x = 8,761.32

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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.