Home / 30,539.48-42,139.58-18,606.56

Finding the Fourth Proportional to 30,539.48, 42,139.58 and 18,606.56

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Solution

The fourth proportional to 30,539.48, 42,139.58 and 18,606.56 is: 25,674.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,539.48 : 42,139.58 = 18,606.56 : x
  2. Step 2: Convert to fraction form
    30,539.48/42,139.58 = 18,606.56/x
  3. Step 3: Cross multiply
    30,539.48x = 42,139.58 × 18,606.56
  4. Step 4: Simplify right side
    30,539.48x = 784,072,319.91
  5. Step 5: Solve for x
    x = 784,072,319.91/30,539.48
  6. Step 6: Final answer
    x = 25,674.06

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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.