Home / 19,111.20-28,688.40-11,324.40

Finding the Fourth Proportional to 19,111.20, 28,688.40 and 11,324.40

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Solution

The fourth proportional to 19,111.20, 28,688.40 and 11,324.40 is: 16,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.20 : 28,688.40 = 11,324.40 : x
  2. Step 2: Convert to fraction form
    19,111.20/28,688.40 = 11,324.40/x
  3. Step 3: Cross multiply
    19,111.20x = 28,688.40 × 11,324.40
  4. Step 4: Simplify right side
    19,111.20x = 324,878,916.96
  5. Step 5: Solve for x
    x = 324,878,916.96/19,111.20
  6. Step 6: Final answer
    x = 16,999.40

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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.