Home / 15,660.77-21,479.55-14,813.51

Finding the Fourth Proportional to 15,660.77, 21,479.55 and 14,813.51

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Solution

The fourth proportional to 15,660.77, 21,479.55 and 14,813.51 is: 20,317.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.77 : 21,479.55 = 14,813.51 : x
  2. Step 2: Convert to fraction form
    15,660.77/21,479.55 = 14,813.51/x
  3. Step 3: Cross multiply
    15,660.77x = 21,479.55 × 14,813.51
  4. Step 4: Simplify right side
    15,660.77x = 318,187,365.77
  5. Step 5: Solve for x
    x = 318,187,365.77/15,660.77
  6. Step 6: Final answer
    x = 20,317.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.