Home / 20,455.53-28,242.64-15,667.01

Finding the Fourth Proportional to 20,455.53, 28,242.64 and 15,667.01

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Solution

The fourth proportional to 20,455.53, 28,242.64 and 15,667.01 is: 21,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.53 : 28,242.64 = 15,667.01 : x
  2. Step 2: Convert to fraction form
    20,455.53/28,242.64 = 15,667.01/x
  3. Step 3: Cross multiply
    20,455.53x = 28,242.64 × 15,667.01
  4. Step 4: Simplify right side
    20,455.53x = 442,477,723.31
  5. Step 5: Solve for x
    x = 442,477,723.31/20,455.53
  6. Step 6: Final answer
    x = 21,631.20

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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.