Home / 30,318.64-45,402-19,191.76

Finding the Fourth Proportional to 30,318.64, 45,402 and 19,191.76

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Solution

The fourth proportional to 30,318.64, 45,402 and 19,191.76 is: 28,739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,318.64 : 45,402 = 19,191.76 : x
  2. Step 2: Convert to fraction form
    30,318.64/45,402 = 19,191.76/x
  3. Step 3: Cross multiply
    30,318.64x = 45,402 × 19,191.76
  4. Step 4: Simplify right side
    30,318.64x = 871,344,287.52
  5. Step 5: Solve for x
    x = 871,344,287.52/30,318.64
  6. Step 6: Final answer
    x = 28,739.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.