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Finding the Fourth Proportional to 7,880.63, 10,875.40 and 5,090.99

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Solution

The fourth proportional to 7,880.63, 10,875.40 and 5,090.99 is: 7,025.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.63 : 10,875.40 = 5,090.99 : x
  2. Step 2: Convert to fraction form
    7,880.63/10,875.40 = 5,090.99/x
  3. Step 3: Cross multiply
    7,880.63x = 10,875.40 × 5,090.99
  4. Step 4: Simplify right side
    7,880.63x = 55,366,485.54
  5. Step 5: Solve for x
    x = 55,366,485.54/7,880.63
  6. Step 6: Final answer
    x = 7,025.65

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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.