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Finding the Fourth Proportional to 13,630.17, 18,807.95 and 7,888.62

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Solution

The fourth proportional to 13,630.17, 18,807.95 and 7,888.62 is: 10,885.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.17 : 18,807.95 = 7,888.62 : x
  2. Step 2: Convert to fraction form
    13,630.17/18,807.95 = 7,888.62/x
  3. Step 3: Cross multiply
    13,630.17x = 18,807.95 × 7,888.62
  4. Step 4: Simplify right side
    13,630.17x = 148,368,731.09
  5. Step 5: Solve for x
    x = 148,368,731.09/13,630.17
  6. Step 6: Final answer
    x = 10,885.32

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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.