Home / 30,309.90-45,445.41-12,775.02

Finding the Fourth Proportional to 30,309.90, 45,445.41 and 12,775.02

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Solution

The fourth proportional to 30,309.90, 45,445.41 and 12,775.02 is: 19,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,309.90 : 45,445.41 = 12,775.02 : x
  2. Step 2: Convert to fraction form
    30,309.90/45,445.41 = 12,775.02/x
  3. Step 3: Cross multiply
    30,309.90x = 45,445.41 × 12,775.02
  4. Step 4: Simplify right side
    30,309.90x = 580,566,021.66
  5. Step 5: Solve for x
    x = 580,566,021.66/30,309.90
  6. Step 6: Final answer
    x = 19,154.34

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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.