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Finding the Fourth Proportional to 18,689.44, 28,030.64 and 7,000.16

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Solution

The fourth proportional to 18,689.44, 28,030.64 and 7,000.16 is: 10,498.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.44 : 28,030.64 = 7,000.16 : x
  2. Step 2: Convert to fraction form
    18,689.44/28,030.64 = 7,000.16/x
  3. Step 3: Cross multiply
    18,689.44x = 28,030.64 × 7,000.16
  4. Step 4: Simplify right side
    18,689.44x = 196,218,964.90
  5. Step 5: Solve for x
    x = 196,218,964.90/18,689.44
  6. Step 6: Final answer
    x = 10,498.92

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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.