Home / 21,482.78-29,668.74-14,785.70

Finding the Fourth Proportional to 21,482.78, 29,668.74 and 14,785.70

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Solution

The fourth proportional to 21,482.78, 29,668.74 and 14,785.70 is: 20,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,482.78 : 29,668.74 = 14,785.70 : x
  2. Step 2: Convert to fraction form
    21,482.78/29,668.74 = 14,785.70/x
  3. Step 3: Cross multiply
    21,482.78x = 29,668.74 × 14,785.70
  4. Step 4: Simplify right side
    21,482.78x = 438,673,089.02
  5. Step 5: Solve for x
    x = 438,673,089.02/21,482.78
  6. Step 6: Final answer
    x = 20,419.75

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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.