Home / 43,785.90-65,681.28-12,620.34

Finding the Fourth Proportional to 43,785.90, 65,681.28 and 12,620.34

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Solution

The fourth proportional to 43,785.90, 65,681.28 and 12,620.34 is: 18,931.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,785.90 : 65,681.28 = 12,620.34 : x
  2. Step 2: Convert to fraction form
    43,785.90/65,681.28 = 12,620.34/x
  3. Step 3: Cross multiply
    43,785.90x = 65,681.28 × 12,620.34
  4. Step 4: Simplify right side
    43,785.90x = 828,920,085.24
  5. Step 5: Solve for x
    x = 828,920,085.24/43,785.90
  6. Step 6: Final answer
    x = 18,931.21

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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.