Home / 15,128.10-20,883.69-9,081.18

Finding the Fourth Proportional to 15,128.10, 20,883.69 and 9,081.18

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Solution

The fourth proportional to 15,128.10, 20,883.69 and 9,081.18 is: 12,536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.10 : 20,883.69 = 9,081.18 : x
  2. Step 2: Convert to fraction form
    15,128.10/20,883.69 = 9,081.18/x
  3. Step 3: Cross multiply
    15,128.10x = 20,883.69 × 9,081.18
  4. Step 4: Simplify right side
    15,128.10x = 189,648,547.95
  5. Step 5: Solve for x
    x = 189,648,547.95/15,128.10
  6. Step 6: Final answer
    x = 12,536.18

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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.