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Finding the Fourth Proportional to 18,870.17, 28,305.30 and 5,019.17

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Solution

The fourth proportional to 18,870.17, 28,305.30 and 5,019.17 is: 7,528.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.17 : 28,305.30 = 5,019.17 : x
  2. Step 2: Convert to fraction form
    18,870.17/28,305.30 = 5,019.17/x
  3. Step 3: Cross multiply
    18,870.17x = 28,305.30 × 5,019.17
  4. Step 4: Simplify right side
    18,870.17x = 142,069,112.60
  5. Step 5: Solve for x
    x = 142,069,112.60/18,870.17
  6. Step 6: Final answer
    x = 7,528.77

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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.