Home / 8,790.80-12,127.64-6,428.84

Finding the Fourth Proportional to 8,790.80, 12,127.64 and 6,428.84

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Solution

The fourth proportional to 8,790.80, 12,127.64 and 6,428.84 is: 8,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790.80 : 12,127.64 = 6,428.84 : x
  2. Step 2: Convert to fraction form
    8,790.80/12,127.64 = 6,428.84/x
  3. Step 3: Cross multiply
    8,790.80x = 12,127.64 × 6,428.84
  4. Step 4: Simplify right side
    8,790.80x = 77,966,564.36
  5. Step 5: Solve for x
    x = 77,966,564.36/8,790.80
  6. Step 6: Final answer
    x = 8,869.11

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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.