Home / 19,870.42-27,418.20-10,918.30

Finding the Fourth Proportional to 19,870.42, 27,418.20 and 10,918.30

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Solution

The fourth proportional to 19,870.42, 27,418.20 and 10,918.30 is: 15,065.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.42 : 27,418.20 = 10,918.30 : x
  2. Step 2: Convert to fraction form
    19,870.42/27,418.20 = 10,918.30/x
  3. Step 3: Cross multiply
    19,870.42x = 27,418.20 × 10,918.30
  4. Step 4: Simplify right side
    19,870.42x = 299,360,133.06
  5. Step 5: Solve for x
    x = 299,360,133.06/19,870.42
  6. Step 6: Final answer
    x = 15,065.62

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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.