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Finding the Fourth Proportional to 12,989.77, 19,492.99 and 12,884.06

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Solution

The fourth proportional to 12,989.77, 19,492.99 and 12,884.06 is: 19,334.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.77 : 19,492.99 = 12,884.06 : x
  2. Step 2: Convert to fraction form
    12,989.77/19,492.99 = 12,884.06/x
  3. Step 3: Cross multiply
    12,989.77x = 19,492.99 × 12,884.06
  4. Step 4: Simplify right side
    12,989.77x = 251,148,869.26
  5. Step 5: Solve for x
    x = 251,148,869.26/12,989.77
  6. Step 6: Final answer
    x = 19,334.36

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1.5x scale

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.