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Finding the Fourth Proportional to 30,686.64, 45,952.20 and 18,964.32

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Solution

The fourth proportional to 30,686.64, 45,952.20 and 18,964.32 is: 28,398.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686.64 : 45,952.20 = 18,964.32 : x
  2. Step 2: Convert to fraction form
    30,686.64/45,952.20 = 18,964.32/x
  3. Step 3: Cross multiply
    30,686.64x = 45,952.20 × 18,964.32
  4. Step 4: Simplify right side
    30,686.64x = 871,452,225.50
  5. Step 5: Solve for x
    x = 871,452,225.50/30,686.64
  6. Step 6: Final answer
    x = 28,398.42

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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.