Home / 20,577.36-28,396.71-11,145.90

Finding the Fourth Proportional to 20,577.36, 28,396.71 and 11,145.90

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Solution

The fourth proportional to 20,577.36, 28,396.71 and 11,145.90 is: 15,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.36 : 28,396.71 = 11,145.90 : x
  2. Step 2: Convert to fraction form
    20,577.36/28,396.71 = 11,145.90/x
  3. Step 3: Cross multiply
    20,577.36x = 28,396.71 × 11,145.90
  4. Step 4: Simplify right side
    20,577.36x = 316,506,889.99
  5. Step 5: Solve for x
    x = 316,506,889.99/20,577.36
  6. Step 6: Final answer
    x = 15,381.32

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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.