Home / 13,639-18,818.56-7,669.48

Finding the Fourth Proportional to 13,639, 18,818.56 and 7,669.48

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Solution

The fourth proportional to 13,639, 18,818.56 and 7,669.48 is: 10,582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639 : 18,818.56 = 7,669.48 : x
  2. Step 2: Convert to fraction form
    13,639/18,818.56 = 7,669.48/x
  3. Step 3: Cross multiply
    13,639x = 18,818.56 × 7,669.48
  4. Step 4: Simplify right side
    13,639x = 144,328,569.55
  5. Step 5: Solve for x
    x = 144,328,569.55/13,639
  6. Step 6: Final answer
    x = 10,582.05

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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.