Home / 20,547.79-28,355.99-11,116.35

Finding the Fourth Proportional to 20,547.79, 28,355.99 and 11,116.35

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Solution

The fourth proportional to 20,547.79, 28,355.99 and 11,116.35 is: 15,340.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.79 : 28,355.99 = 11,116.35 : x
  2. Step 2: Convert to fraction form
    20,547.79/28,355.99 = 11,116.35/x
  3. Step 3: Cross multiply
    20,547.79x = 28,355.99 × 11,116.35
  4. Step 4: Simplify right side
    20,547.79x = 315,215,109.44
  5. Step 5: Solve for x
    x = 315,215,109.44/20,547.79
  6. Step 6: Final answer
    x = 15,340.58

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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.