Home / 15,309.49-21,129.40-9,344.62

Finding the Fourth Proportional to 15,309.49, 21,129.40 and 9,344.62

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Solution

The fourth proportional to 15,309.49, 21,129.40 and 9,344.62 is: 12,896.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.49 : 21,129.40 = 9,344.62 : x
  2. Step 2: Convert to fraction form
    15,309.49/21,129.40 = 9,344.62/x
  3. Step 3: Cross multiply
    15,309.49x = 21,129.40 × 9,344.62
  4. Step 4: Simplify right side
    15,309.49x = 197,446,213.83
  5. Step 5: Solve for x
    x = 197,446,213.83/15,309.49
  6. Step 6: Final answer
    x = 12,896.98

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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.