Home / 21,191.64-29,378.36-20,068.20

Finding the Fourth Proportional to 21,191.64, 29,378.36 and 20,068.20

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Solution

The fourth proportional to 21,191.64, 29,378.36 and 20,068.20 is: 27,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.64 : 29,378.36 = 20,068.20 : x
  2. Step 2: Convert to fraction form
    21,191.64/29,378.36 = 20,068.20/x
  3. Step 3: Cross multiply
    21,191.64x = 29,378.36 × 20,068.20
  4. Step 4: Simplify right side
    21,191.64x = 589,570,804.15
  5. Step 5: Solve for x
    x = 589,570,804.15/21,191.64
  6. Step 6: Final answer
    x = 27,820.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.