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Finding the Fourth Proportional to 46,428.80, 69,643.60 and 13,149.60

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Solution

The fourth proportional to 46,428.80, 69,643.60 and 13,149.60 is: 19,724.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,428.80 : 69,643.60 = 13,149.60 : x
  2. Step 2: Convert to fraction form
    46,428.80/69,643.60 = 13,149.60/x
  3. Step 3: Cross multiply
    46,428.80x = 69,643.60 × 13,149.60
  4. Step 4: Simplify right side
    46,428.80x = 915,785,482.56
  5. Step 5: Solve for x
    x = 915,785,482.56/46,428.80
  6. Step 6: Final answer
    x = 19,724.51

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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.