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Finding the Fourth Proportional to 8,788.40, 12,128.00 and 4,809.51

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Solution

The fourth proportional to 8,788.40, 12,128.00 and 4,809.51 is: 6,637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.40 : 12,128.00 = 4,809.51 : x
  2. Step 2: Convert to fraction form
    8,788.40/12,128.00 = 4,809.51/x
  3. Step 3: Cross multiply
    8,788.40x = 12,128.00 × 4,809.51
  4. Step 4: Simplify right side
    8,788.40x = 58,329,713.23
  5. Step 5: Solve for x
    x = 58,329,713.23/8,788.40
  6. Step 6: Final answer
    x = 6,637.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.