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Finding the Fourth Proportional to 12,653, 18,988.14 and 4,445

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Solution

The fourth proportional to 12,653, 18,988.14 and 4,445 is: 6,670.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653 : 18,988.14 = 4,445 : x
  2. Step 2: Convert to fraction form
    12,653/18,988.14 = 4,445/x
  3. Step 3: Cross multiply
    12,653x = 18,988.14 × 4,445
  4. Step 4: Simplify right side
    12,653x = 84,402,282.30
  5. Step 5: Solve for x
    x = 84,402,282.30/12,653
  6. Step 6: Final answer
    x = 6,670.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.