Home / 28,620.45-42,955.37-19,861.51

Finding the Fourth Proportional to 28,620.45, 42,955.37 and 19,861.51

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Solution

The fourth proportional to 28,620.45, 42,955.37 and 19,861.51 is: 29,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.45 : 42,955.37 = 19,861.51 : x
  2. Step 2: Convert to fraction form
    28,620.45/42,955.37 = 19,861.51/x
  3. Step 3: Cross multiply
    28,620.45x = 42,955.37 × 19,861.51
  4. Step 4: Simplify right side
    28,620.45x = 853,158,510.81
  5. Step 5: Solve for x
    x = 853,158,510.81/28,620.45
  6. Step 6: Final answer
    x = 29,809.40

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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.