Home / 28,036.80-38,690.29-15,290.08

Finding the Fourth Proportional to 28,036.80, 38,690.29 and 15,290.08

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Solution

The fourth proportional to 28,036.80, 38,690.29 and 15,290.08 is: 21,100.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,036.80 : 38,690.29 = 15,290.08 : x
  2. Step 2: Convert to fraction form
    28,036.80/38,690.29 = 15,290.08/x
  3. Step 3: Cross multiply
    28,036.80x = 38,690.29 × 15,290.08
  4. Step 4: Simplify right side
    28,036.80x = 591,577,494.37
  5. Step 5: Solve for x
    x = 591,577,494.37/28,036.80
  6. Step 6: Final answer
    x = 21,100.04

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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.