Home / 13,709.12-18,916.54-7,740.66

Finding the Fourth Proportional to 13,709.12, 18,916.54 and 7,740.66

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Solution

The fourth proportional to 13,709.12, 18,916.54 and 7,740.66 is: 10,680.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.12 : 18,916.54 = 7,740.66 : x
  2. Step 2: Convert to fraction form
    13,709.12/18,916.54 = 7,740.66/x
  3. Step 3: Cross multiply
    13,709.12x = 18,916.54 × 7,740.66
  4. Step 4: Simplify right side
    13,709.12x = 146,426,504.52
  5. Step 5: Solve for x
    x = 146,426,504.52/13,709.12
  6. Step 6: Final answer
    x = 10,680.96

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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.