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Finding the Fourth Proportional to 18,937.16, 28,409.80 and 5,790.50

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Solution

The fourth proportional to 18,937.16, 28,409.80 and 5,790.50 is: 8,686.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.16 : 28,409.80 = 5,790.50 : x
  2. Step 2: Convert to fraction form
    18,937.16/28,409.80 = 5,790.50/x
  3. Step 3: Cross multiply
    18,937.16x = 28,409.80 × 5,790.50
  4. Step 4: Simplify right side
    18,937.16x = 164,506,946.90
  5. Step 5: Solve for x
    x = 164,506,946.90/18,937.16
  6. Step 6: Final answer
    x = 8,686.99

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