Home / 28,428.99-42,680.37-21,859.77

Finding the Fourth Proportional to 28,428.99, 42,680.37 and 21,859.77

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Solution

The fourth proportional to 28,428.99, 42,680.37 and 21,859.77 is: 32,818.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.99 : 42,680.37 = 21,859.77 : x
  2. Step 2: Convert to fraction form
    28,428.99/42,680.37 = 21,859.77/x
  3. Step 3: Cross multiply
    28,428.99x = 42,680.37 × 21,859.77
  4. Step 4: Simplify right side
    28,428.99x = 932,983,071.71
  5. Step 5: Solve for x
    x = 932,983,071.71/28,428.99
  6. Step 6: Final answer
    x = 32,818.02

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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.