Home / 12,390.22-18,585.33-4,390.93

Finding the Fourth Proportional to 12,390.22, 18,585.33 and 4,390.93

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Solution

The fourth proportional to 12,390.22, 18,585.33 and 4,390.93 is: 6,586.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.22 : 18,585.33 = 4,390.93 : x
  2. Step 2: Convert to fraction form
    12,390.22/18,585.33 = 4,390.93/x
  3. Step 3: Cross multiply
    12,390.22x = 18,585.33 × 4,390.93
  4. Step 4: Simplify right side
    12,390.22x = 81,606,883.06
  5. Step 5: Solve for x
    x = 81,606,883.06/12,390.22
  6. Step 6: Final answer
    x = 6,586.40

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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.