Home / 30,912.48-42,616.80-20,699.52

Finding the Fourth Proportional to 30,912.48, 42,616.80 and 20,699.52

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Solution

The fourth proportional to 30,912.48, 42,616.80 and 20,699.52 is: 28,536.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912.48 : 42,616.80 = 20,699.52 : x
  2. Step 2: Convert to fraction form
    30,912.48/42,616.80 = 20,699.52/x
  3. Step 3: Cross multiply
    30,912.48x = 42,616.80 × 20,699.52
  4. Step 4: Simplify right side
    30,912.48x = 882,147,303.94
  5. Step 5: Solve for x
    x = 882,147,303.94/30,912.48
  6. Step 6: Final answer
    x = 28,536.93

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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.