Home / 3,686.40-5,088.96-2,639.04

Finding the Fourth Proportional to 3,686.40, 5,088.96 and 2,639.04

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Solution

The fourth proportional to 3,686.40, 5,088.96 and 2,639.04 is: 3,643.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.40 : 5,088.96 = 2,639.04 : x
  2. Step 2: Convert to fraction form
    3,686.40/5,088.96 = 2,639.04/x
  3. Step 3: Cross multiply
    3,686.40x = 5,088.96 × 2,639.04
  4. Step 4: Simplify right side
    3,686.40x = 13,429,969.00
  5. Step 5: Solve for x
    x = 13,429,969.00/3,686.40
  6. Step 6: Final answer
    x = 3,643.11

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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.