Home / 30,666.93-42,281.26-20,579.37

Finding the Fourth Proportional to 30,666.93, 42,281.26 and 20,579.37

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Solution

The fourth proportional to 30,666.93, 42,281.26 and 20,579.37 is: 28,373.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,666.93 : 42,281.26 = 20,579.37 : x
  2. Step 2: Convert to fraction form
    30,666.93/42,281.26 = 20,579.37/x
  3. Step 3: Cross multiply
    30,666.93x = 42,281.26 × 20,579.37
  4. Step 4: Simplify right side
    30,666.93x = 870,121,693.61
  5. Step 5: Solve for x
    x = 870,121,693.61/30,666.93
  6. Step 6: Final answer
    x = 28,373.29

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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.