Home / 30,315.12-45,445.32-12,786

Finding the Fourth Proportional to 30,315.12, 45,445.32 and 12,786

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Solution

The fourth proportional to 30,315.12, 45,445.32 and 12,786 is: 19,167.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,315.12 : 45,445.32 = 12,786 : x
  2. Step 2: Convert to fraction form
    30,315.12/45,445.32 = 12,786/x
  3. Step 3: Cross multiply
    30,315.12x = 45,445.32 × 12,786
  4. Step 4: Simplify right side
    30,315.12x = 581,063,861.52
  5. Step 5: Solve for x
    x = 581,063,861.52/30,315.12
  6. Step 6: Final answer
    x = 19,167.46

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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.