Home / 19,420.32-26,789.22-13,455.48

Finding the Fourth Proportional to 19,420.32, 26,789.22 and 13,455.48

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Solution

The fourth proportional to 19,420.32, 26,789.22 and 13,455.48 is: 18,561.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,420.32 : 26,789.22 = 13,455.48 : x
  2. Step 2: Convert to fraction form
    19,420.32/26,789.22 = 13,455.48/x
  3. Step 3: Cross multiply
    19,420.32x = 26,789.22 × 13,455.48
  4. Step 4: Simplify right side
    19,420.32x = 360,461,813.93
  5. Step 5: Solve for x
    x = 360,461,813.93/19,420.32
  6. Step 6: Final answer
    x = 18,561.06

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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.