Home / 15,309.65-21,127.29-8,935.76

Finding the Fourth Proportional to 15,309.65, 21,127.29 and 8,935.76

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Solution

The fourth proportional to 15,309.65, 21,127.29 and 8,935.76 is: 12,331.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.65 : 21,127.29 = 8,935.76 : x
  2. Step 2: Convert to fraction form
    15,309.65/21,127.29 = 8,935.76/x
  3. Step 3: Cross multiply
    15,309.65x = 21,127.29 × 8,935.76
  4. Step 4: Simplify right side
    15,309.65x = 188,788,287.25
  5. Step 5: Solve for x
    x = 188,788,287.25/15,309.65
  6. Step 6: Final answer
    x = 12,331.33

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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.