Home / 21,785.95-30,065.75-12,836.26

Finding the Fourth Proportional to 21,785.95, 30,065.75 and 12,836.26

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Solution

The fourth proportional to 21,785.95, 30,065.75 and 12,836.26 is: 17,714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785.95 : 30,065.75 = 12,836.26 : x
  2. Step 2: Convert to fraction form
    21,785.95/30,065.75 = 12,836.26/x
  3. Step 3: Cross multiply
    21,785.95x = 30,065.75 × 12,836.26
  4. Step 4: Simplify right side
    21,785.95x = 385,931,784.10
  5. Step 5: Solve for x
    x = 385,931,784.10/21,785.95
  6. Step 6: Final answer
    x = 17,714.71

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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.