Home / 30,688.34-42,351.65-20,461.73

Finding the Fourth Proportional to 30,688.34, 42,351.65 and 20,461.73

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Solution

The fourth proportional to 30,688.34, 42,351.65 and 20,461.73 is: 28,238.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.34 : 42,351.65 = 20,461.73 : x
  2. Step 2: Convert to fraction form
    30,688.34/42,351.65 = 20,461.73/x
  3. Step 3: Cross multiply
    30,688.34x = 42,351.65 × 20,461.73
  4. Step 4: Simplify right side
    30,688.34x = 866,587,790.02
  5. Step 5: Solve for x
    x = 866,587,790.02/30,688.34
  6. Step 6: Final answer
    x = 28,238.34

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Double scale
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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.