Home / 12,218.81-18,315.90-4,820.40

Finding the Fourth Proportional to 12,218.81, 18,315.90 and 4,820.40

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Solution

The fourth proportional to 12,218.81, 18,315.90 and 4,820.40 is: 7,225.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.81 : 18,315.90 = 4,820.40 : x
  2. Step 2: Convert to fraction form
    12,218.81/18,315.90 = 4,820.40/x
  3. Step 3: Cross multiply
    12,218.81x = 18,315.90 × 4,820.40
  4. Step 4: Simplify right side
    12,218.81x = 88,289,964.36
  5. Step 5: Solve for x
    x = 88,289,964.36/12,218.81
  6. Step 6: Final answer
    x = 7,225.74

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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.