Home / 20,705.07-28,544.28-13,980.04

Finding the Fourth Proportional to 20,705.07, 28,544.28 and 13,980.04

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Solution

The fourth proportional to 20,705.07, 28,544.28 and 13,980.04 is: 19,273.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.07 : 28,544.28 = 13,980.04 : x
  2. Step 2: Convert to fraction form
    20,705.07/28,544.28 = 13,980.04/x
  3. Step 3: Cross multiply
    20,705.07x = 28,544.28 × 13,980.04
  4. Step 4: Simplify right side
    20,705.07x = 399,050,176.17
  5. Step 5: Solve for x
    x = 399,050,176.17/20,705.07
  6. Step 6: Final answer
    x = 19,273.07

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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.