Home / 27,721.71-38,256.33-15,785.10

Finding the Fourth Proportional to 27,721.71, 38,256.33 and 15,785.10

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Solution

The fourth proportional to 27,721.71, 38,256.33 and 15,785.10 is: 21,783.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721.71 : 38,256.33 = 15,785.10 : x
  2. Step 2: Convert to fraction form
    27,721.71/38,256.33 = 15,785.10/x
  3. Step 3: Cross multiply
    27,721.71x = 38,256.33 × 15,785.10
  4. Step 4: Simplify right side
    27,721.71x = 603,879,938.50
  5. Step 5: Solve for x
    x = 603,879,938.50/27,721.71
  6. Step 6: Final answer
    x = 21,783.64

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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.