Home / 15,719.96-21,690.72-11,538.20

Finding the Fourth Proportional to 15,719.96, 21,690.72 and 11,538.20

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Solution

The fourth proportional to 15,719.96, 21,690.72 and 11,538.20 is: 15,920.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.96 : 21,690.72 = 11,538.20 : x
  2. Step 2: Convert to fraction form
    15,719.96/21,690.72 = 11,538.20/x
  3. Step 3: Cross multiply
    15,719.96x = 21,690.72 × 11,538.20
  4. Step 4: Simplify right side
    15,719.96x = 250,271,865.50
  5. Step 5: Solve for x
    x = 250,271,865.50/15,719.96
  6. Step 6: Final answer
    x = 15,920.64

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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.