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Finding the Fourth Proportional to 9,689.10, 14,544.45 and 5,315.10

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Solution

The fourth proportional to 9,689.10, 14,544.45 and 5,315.10 is: 7,978.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,689.10 : 14,544.45 = 5,315.10 : x
  2. Step 2: Convert to fraction form
    9,689.10/14,544.45 = 5,315.10/x
  3. Step 3: Cross multiply
    9,689.10x = 14,544.45 × 5,315.10
  4. Step 4: Simplify right side
    9,689.10x = 77,305,206.20
  5. Step 5: Solve for x
    x = 77,305,206.20/9,689.10
  6. Step 6: Final answer
    x = 7,978.57

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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.