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Finding the Fourth Proportional to 15,309.12, 21,124.07 and 9,020.64

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Solution

The fourth proportional to 15,309.12, 21,124.07 and 9,020.64 is: 12,447.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.12 : 21,124.07 = 9,020.64 : x
  2. Step 2: Convert to fraction form
    15,309.12/21,124.07 = 9,020.64/x
  3. Step 3: Cross multiply
    15,309.12x = 21,124.07 × 9,020.64
  4. Step 4: Simplify right side
    15,309.12x = 190,552,630.80
  5. Step 5: Solve for x
    x = 190,552,630.80/15,309.12
  6. Step 6: Final answer
    x = 12,447.00

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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.