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Finding the Fourth Proportional to 9,718.56, 13,420.08 and 7,619.04

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Solution

The fourth proportional to 9,718.56, 13,420.08 and 7,619.04 is: 10,520.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,718.56 : 13,420.08 = 7,619.04 : x
  2. Step 2: Convert to fraction form
    9,718.56/13,420.08 = 7,619.04/x
  3. Step 3: Cross multiply
    9,718.56x = 13,420.08 × 7,619.04
  4. Step 4: Simplify right side
    9,718.56x = 102,248,126.32
  5. Step 5: Solve for x
    x = 102,248,126.32/9,718.56
  6. Step 6: Final answer
    x = 10,520.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.