Home / 13,345.79-18,417.49-8,638.27

Finding the Fourth Proportional to 13,345.79, 18,417.49 and 8,638.27

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Solution

The fourth proportional to 13,345.79, 18,417.49 and 8,638.27 is: 11,921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.79 : 18,417.49 = 8,638.27 : x
  2. Step 2: Convert to fraction form
    13,345.79/18,417.49 = 8,638.27/x
  3. Step 3: Cross multiply
    13,345.79x = 18,417.49 × 8,638.27
  4. Step 4: Simplify right side
    13,345.79x = 159,095,183.70
  5. Step 5: Solve for x
    x = 159,095,183.70/13,345.79
  6. Step 6: Final answer
    x = 11,921.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.