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Finding the Fourth Proportional to 15,587.30, 21,510.96 and 9,619.22

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Solution

The fourth proportional to 15,587.30, 21,510.96 and 9,619.22 is: 13,274.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,587.30 : 21,510.96 = 9,619.22 : x
  2. Step 2: Convert to fraction form
    15,587.30/21,510.96 = 9,619.22/x
  3. Step 3: Cross multiply
    15,587.30x = 21,510.96 × 9,619.22
  4. Step 4: Simplify right side
    15,587.30x = 206,918,656.65
  5. Step 5: Solve for x
    x = 206,918,656.65/15,587.30
  6. Step 6: Final answer
    x = 13,274.82

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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.