Home / 15,456.58-21,320.47-13,566.64

Finding the Fourth Proportional to 15,456.58, 21,320.47 and 13,566.64

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Solution

The fourth proportional to 15,456.58, 21,320.47 and 13,566.64 is: 18,713.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.58 : 21,320.47 = 13,566.64 : x
  2. Step 2: Convert to fraction form
    15,456.58/21,320.47 = 13,566.64/x
  3. Step 3: Cross multiply
    15,456.58x = 21,320.47 × 13,566.64
  4. Step 4: Simplify right side
    15,456.58x = 289,247,141.12
  5. Step 5: Solve for x
    x = 289,247,141.12/15,456.58
  6. Step 6: Final answer
    x = 18,713.53

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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.