Home / 13,155.66-19,639.77-12,694.32

Finding the Fourth Proportional to 13,155.66, 19,639.77 and 12,694.32

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Solution

The fourth proportional to 13,155.66, 19,639.77 and 12,694.32 is: 18,951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.66 : 19,639.77 = 12,694.32 : x
  2. Step 2: Convert to fraction form
    13,155.66/19,639.77 = 12,694.32/x
  3. Step 3: Cross multiply
    13,155.66x = 19,639.77 × 12,694.32
  4. Step 4: Simplify right side
    13,155.66x = 249,313,525.11
  5. Step 5: Solve for x
    x = 249,313,525.11/13,155.66
  6. Step 6: Final answer
    x = 18,951.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.