Home / 27,870.36-38,459.10-15,934.20

Finding the Fourth Proportional to 27,870.36, 38,459.10 and 15,934.20

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Solution

The fourth proportional to 27,870.36, 38,459.10 and 15,934.20 is: 21,988.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,870.36 : 38,459.10 = 15,934.20 : x
  2. Step 2: Convert to fraction form
    27,870.36/38,459.10 = 15,934.20/x
  3. Step 3: Cross multiply
    27,870.36x = 38,459.10 × 15,934.20
  4. Step 4: Simplify right side
    27,870.36x = 612,814,991.22
  5. Step 5: Solve for x
    x = 612,814,991.22/27,870.36
  6. Step 6: Final answer
    x = 21,988.05

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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.