Home / 27,785.40-38,334.36-15,840.12

Finding the Fourth Proportional to 27,785.40, 38,334.36 and 15,840.12

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Solution

The fourth proportional to 27,785.40, 38,334.36 and 15,840.12 is: 21,853.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,785.40 : 38,334.36 = 15,840.12 : x
  2. Step 2: Convert to fraction form
    27,785.40/38,334.36 = 15,840.12/x
  3. Step 3: Cross multiply
    27,785.40x = 38,334.36 × 15,840.12
  4. Step 4: Simplify right side
    27,785.40x = 607,220,862.52
  5. Step 5: Solve for x
    x = 607,220,862.52/27,785.40
  6. Step 6: Final answer
    x = 21,853.95

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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.