Home / 28,218.24-42,346.80-12,653.28

Finding the Fourth Proportional to 28,218.24, 42,346.80 and 12,653.28

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Solution

The fourth proportional to 28,218.24, 42,346.80 and 12,653.28 is: 18,988.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.24 : 42,346.80 = 12,653.28 : x
  2. Step 2: Convert to fraction form
    28,218.24/42,346.80 = 12,653.28/x
  3. Step 3: Cross multiply
    28,218.24x = 42,346.80 × 12,653.28
  4. Step 4: Simplify right side
    28,218.24x = 535,825,917.50
  5. Step 5: Solve for x
    x = 535,825,917.50/28,218.24
  6. Step 6: Final answer
    x = 18,988.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.