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Finding the Fourth Proportional to 13,915.71, 19,203.93 and 7,628.04

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Solution

The fourth proportional to 13,915.71, 19,203.93 and 7,628.04 is: 10,526.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.71 : 19,203.93 = 7,628.04 : x
  2. Step 2: Convert to fraction form
    13,915.71/19,203.93 = 7,628.04/x
  3. Step 3: Cross multiply
    13,915.71x = 19,203.93 × 7,628.04
  4. Step 4: Simplify right side
    13,915.71x = 146,488,346.20
  5. Step 5: Solve for x
    x = 146,488,346.20/13,915.71
  6. Step 6: Final answer
    x = 10,526.83

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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.