Home / 28,210.72-38,933.52-15,638.56

Finding the Fourth Proportional to 28,210.72, 38,933.52 and 15,638.56

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Solution

The fourth proportional to 28,210.72, 38,933.52 and 15,638.56 is: 21,582.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.72 : 38,933.52 = 15,638.56 : x
  2. Step 2: Convert to fraction form
    28,210.72/38,933.52 = 15,638.56/x
  3. Step 3: Cross multiply
    28,210.72x = 38,933.52 × 15,638.56
  4. Step 4: Simplify right side
    28,210.72x = 608,864,188.53
  5. Step 5: Solve for x
    x = 608,864,188.53/28,210.72
  6. Step 6: Final answer
    x = 21,582.72

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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.