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Finding the Fourth Proportional to 7,875.60, 11,813.40 and 6,903.60

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Solution

The fourth proportional to 7,875.60, 11,813.40 and 6,903.60 is: 10,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.60 : 11,813.40 = 6,903.60 : x
  2. Step 2: Convert to fraction form
    7,875.60/11,813.40 = 6,903.60/x
  3. Step 3: Cross multiply
    7,875.60x = 11,813.40 × 6,903.60
  4. Step 4: Simplify right side
    7,875.60x = 81,554,988.24
  5. Step 5: Solve for x
    x = 81,554,988.24/7,875.60
  6. Step 6: Final answer
    x = 10,355.40

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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.