Home / 20,424.80-30,621.65-10,557.79

Finding the Fourth Proportional to 20,424.80, 30,621.65 and 10,557.79

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Solution

The fourth proportional to 20,424.80, 30,621.65 and 10,557.79 is: 15,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.80 : 30,621.65 = 10,557.79 : x
  2. Step 2: Convert to fraction form
    20,424.80/30,621.65 = 10,557.79/x
  3. Step 3: Cross multiply
    20,424.80x = 30,621.65 × 10,557.79
  4. Step 4: Simplify right side
    20,424.80x = 323,296,899.99
  5. Step 5: Solve for x
    x = 323,296,899.99/20,424.80
  6. Step 6: Final answer
    x = 15,828.64

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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.