Home / 18,911.16-28,365.12-7,810.92

Finding the Fourth Proportional to 18,911.16, 28,365.12 and 7,810.92

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Solution

The fourth proportional to 18,911.16, 28,365.12 and 7,810.92 is: 11,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.16 : 28,365.12 = 7,810.92 : x
  2. Step 2: Convert to fraction form
    18,911.16/28,365.12 = 7,810.92/x
  3. Step 3: Cross multiply
    18,911.16x = 28,365.12 × 7,810.92
  4. Step 4: Simplify right side
    18,911.16x = 221,557,683.11
  5. Step 5: Solve for x
    x = 221,557,683.11/18,911.16
  6. Step 6: Final answer
    x = 11,715.71

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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.