Home / 30,621.22-45,931.80-8,434.72

Finding the Fourth Proportional to 30,621.22, 45,931.80 and 8,434.72

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Solution

The fourth proportional to 30,621.22, 45,931.80 and 8,434.72 is: 12,652.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.22 : 45,931.80 = 8,434.72 : x
  2. Step 2: Convert to fraction form
    30,621.22/45,931.80 = 8,434.72/x
  3. Step 3: Cross multiply
    30,621.22x = 45,931.80 × 8,434.72
  4. Step 4: Simplify right side
    30,621.22x = 387,421,872.10
  5. Step 5: Solve for x
    x = 387,421,872.10/30,621.22
  6. Step 6: Final answer
    x = 12,652.07

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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.