Home / 30,315.36-45,479.24-12,785.20

Finding the Fourth Proportional to 30,315.36, 45,479.24 and 12,785.20

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Solution

The fourth proportional to 30,315.36, 45,479.24 and 12,785.20 is: 19,180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,315.36 : 45,479.24 = 12,785.20 : x
  2. Step 2: Convert to fraction form
    30,315.36/45,479.24 = 12,785.20/x
  3. Step 3: Cross multiply
    30,315.36x = 45,479.24 × 12,785.20
  4. Step 4: Simplify right side
    30,315.36x = 581,461,179.25
  5. Step 5: Solve for x
    x = 581,461,179.25/30,315.36
  6. Step 6: Final answer
    x = 19,180.41

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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.