Home / 12,815.36-17,678.46-10,428.02

Finding the Fourth Proportional to 12,815.36, 17,678.46 and 10,428.02

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Solution

The fourth proportional to 12,815.36, 17,678.46 and 10,428.02 is: 14,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.36 : 17,678.46 = 10,428.02 : x
  2. Step 2: Convert to fraction form
    12,815.36/17,678.46 = 10,428.02/x
  3. Step 3: Cross multiply
    12,815.36x = 17,678.46 × 10,428.02
  4. Step 4: Simplify right side
    12,815.36x = 184,351,334.45
  5. Step 5: Solve for x
    x = 184,351,334.45/12,815.36
  6. Step 6: Final answer
    x = 14,385.19

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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.