Home / 13,721.10-18,915.70-9,740.76

Finding the Fourth Proportional to 13,721.10, 18,915.70 and 9,740.76

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Solution

The fourth proportional to 13,721.10, 18,915.70 and 9,740.76 is: 13,428.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.10 : 18,915.70 = 9,740.76 : x
  2. Step 2: Convert to fraction form
    13,721.10/18,915.70 = 9,740.76/x
  3. Step 3: Cross multiply
    13,721.10x = 18,915.70 × 9,740.76
  4. Step 4: Simplify right side
    13,721.10x = 184,253,293.93
  5. Step 5: Solve for x
    x = 184,253,293.93/13,721.10
  6. Step 6: Final answer
    x = 13,428.46

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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.