Home / 12,140.45-18,210.76-4,242.92

Finding the Fourth Proportional to 12,140.45, 18,210.76 and 4,242.92

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Solution

The fourth proportional to 12,140.45, 18,210.76 and 4,242.92 is: 6,364.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.45 : 18,210.76 = 4,242.92 : x
  2. Step 2: Convert to fraction form
    12,140.45/18,210.76 = 4,242.92/x
  3. Step 3: Cross multiply
    12,140.45x = 18,210.76 × 4,242.92
  4. Step 4: Simplify right side
    12,140.45x = 77,266,696.16
  5. Step 5: Solve for x
    x = 77,266,696.16/12,140.45
  6. Step 6: Final answer
    x = 6,364.40

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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.