Home / 30,856.90-42,581.66-18,281.65

Finding the Fourth Proportional to 30,856.90, 42,581.66 and 18,281.65

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Solution

The fourth proportional to 30,856.90, 42,581.66 and 18,281.65 is: 25,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,856.90 : 42,581.66 = 18,281.65 : x
  2. Step 2: Convert to fraction form
    30,856.90/42,581.66 = 18,281.65/x
  3. Step 3: Cross multiply
    30,856.90x = 42,581.66 × 18,281.65
  4. Step 4: Simplify right side
    30,856.90x = 778,463,004.54
  5. Step 5: Solve for x
    x = 778,463,004.54/30,856.90
  6. Step 6: Final answer
    x = 25,228.17

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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.