Home / 22,785.12-31,440.32-13,356.64

Finding the Fourth Proportional to 22,785.12, 31,440.32 and 13,356.64

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Solution

The fourth proportional to 22,785.12, 31,440.32 and 13,356.64 is: 18,430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,785.12 : 31,440.32 = 13,356.64 : x
  2. Step 2: Convert to fraction form
    22,785.12/31,440.32 = 13,356.64/x
  3. Step 3: Cross multiply
    22,785.12x = 31,440.32 × 13,356.64
  4. Step 4: Simplify right side
    22,785.12x = 419,937,035.72
  5. Step 5: Solve for x
    x = 419,937,035.72/22,785.12
  6. Step 6: Final answer
    x = 18,430.32

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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.