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Finding the Fourth Proportional to 7,903.68, 10,875.60 and 7,663.20

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Solution

The fourth proportional to 7,903.68, 10,875.60 and 7,663.20 is: 10,544.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.68 : 10,875.60 = 7,663.20 : x
  2. Step 2: Convert to fraction form
    7,903.68/10,875.60 = 7,663.20/x
  3. Step 3: Cross multiply
    7,903.68x = 10,875.60 × 7,663.20
  4. Step 4: Simplify right side
    7,903.68x = 83,341,897.92
  5. Step 5: Solve for x
    x = 83,341,897.92/7,903.68
  6. Step 6: Final answer
    x = 10,544.70

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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.