Home / 20,685.78-28,547.48-11,736.16

Finding the Fourth Proportional to 20,685.78, 28,547.48 and 11,736.16

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Solution

The fourth proportional to 20,685.78, 28,547.48 and 11,736.16 is: 16,196.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.78 : 28,547.48 = 11,736.16 : x
  2. Step 2: Convert to fraction form
    20,685.78/28,547.48 = 11,736.16/x
  3. Step 3: Cross multiply
    20,685.78x = 28,547.48 × 11,736.16
  4. Step 4: Simplify right side
    20,685.78x = 335,037,750.85
  5. Step 5: Solve for x
    x = 335,037,750.85/20,685.78
  6. Step 6: Final answer
    x = 16,196.52

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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.