Home / 27,612.78-38,106.54-15,515.40

Finding the Fourth Proportional to 27,612.78, 38,106.54 and 15,515.40

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Solution

The fourth proportional to 27,612.78, 38,106.54 and 15,515.40 is: 21,411.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,612.78 : 38,106.54 = 15,515.40 : x
  2. Step 2: Convert to fraction form
    27,612.78/38,106.54 = 15,515.40/x
  3. Step 3: Cross multiply
    27,612.78x = 38,106.54 × 15,515.40
  4. Step 4: Simplify right side
    27,612.78x = 591,238,210.72
  5. Step 5: Solve for x
    x = 591,238,210.72/27,612.78
  6. Step 6: Final answer
    x = 21,411.76

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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.