Home / 15,319.28-21,139.58-8,605.56

Finding the Fourth Proportional to 15,319.28, 21,139.58 and 8,605.56

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Solution

The fourth proportional to 15,319.28, 21,139.58 and 8,605.56 is: 11,875.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.28 : 21,139.58 = 8,605.56 : x
  2. Step 2: Convert to fraction form
    15,319.28/21,139.58 = 8,605.56/x
  3. Step 3: Cross multiply
    15,319.28x = 21,139.58 × 8,605.56
  4. Step 4: Simplify right side
    15,319.28x = 181,917,924.06
  5. Step 5: Solve for x
    x = 181,917,924.06/15,319.28
  6. Step 6: Final answer
    x = 11,875.10

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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.