Home / 15,290.10-21,100.55-9,239.51

Finding the Fourth Proportional to 15,290.10, 21,100.55 and 9,239.51

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Solution

The fourth proportional to 15,290.10, 21,100.55 and 9,239.51 is: 12,750.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.10 : 21,100.55 = 9,239.51 : x
  2. Step 2: Convert to fraction form
    15,290.10/21,100.55 = 9,239.51/x
  3. Step 3: Cross multiply
    15,290.10x = 21,100.55 × 9,239.51
  4. Step 4: Simplify right side
    15,290.10x = 194,958,742.73
  5. Step 5: Solve for x
    x = 194,958,742.73/15,290.10
  6. Step 6: Final answer
    x = 12,750.65

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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.