Home / 15,570.68-21,480.99-10,857.69

Finding the Fourth Proportional to 15,570.68, 21,480.99 and 10,857.69

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Solution

The fourth proportional to 15,570.68, 21,480.99 and 10,857.69 is: 14,979.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,570.68 : 21,480.99 = 10,857.69 : x
  2. Step 2: Convert to fraction form
    15,570.68/21,480.99 = 10,857.69/x
  3. Step 3: Cross multiply
    15,570.68x = 21,480.99 × 10,857.69
  4. Step 4: Simplify right side
    15,570.68x = 233,233,930.31
  5. Step 5: Solve for x
    x = 233,233,930.31/15,570.68
  6. Step 6: Final answer
    x = 14,979.05

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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.