Home / 30,135.10-45,192.16-12,360.64

Finding the Fourth Proportional to 30,135.10, 45,192.16 and 12,360.64

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Solution

The fourth proportional to 30,135.10, 45,192.16 and 12,360.64 is: 18,536.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,135.10 : 45,192.16 = 12,360.64 : x
  2. Step 2: Convert to fraction form
    30,135.10/45,192.16 = 12,360.64/x
  3. Step 3: Cross multiply
    30,135.10x = 45,192.16 × 12,360.64
  4. Step 4: Simplify right side
    30,135.10x = 558,604,020.58
  5. Step 5: Solve for x
    x = 558,604,020.58/30,135.10
  6. Step 6: Final answer
    x = 18,536.66

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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.