Home / 18,316.19-25,231.14-15,618.63

Finding the Fourth Proportional to 18,316.19, 25,231.14 and 15,618.63

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Solution

The fourth proportional to 18,316.19, 25,231.14 and 15,618.63 is: 21,515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,316.19 : 25,231.14 = 15,618.63 : x
  2. Step 2: Convert to fraction form
    18,316.19/25,231.14 = 15,618.63/x
  3. Step 3: Cross multiply
    18,316.19x = 25,231.14 × 15,618.63
  4. Step 4: Simplify right side
    18,316.19x = 394,075,934.75
  5. Step 5: Solve for x
    x = 394,075,934.75/18,316.19
  6. Step 6: Final answer
    x = 21,515.17

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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.