Home / 30,511.51-42,110.87-18,246.08

Finding the Fourth Proportional to 30,511.51, 42,110.87 and 18,246.08

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Solution

The fourth proportional to 30,511.51, 42,110.87 and 18,246.08 is: 25,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,511.51 : 42,110.87 = 18,246.08 : x
  2. Step 2: Convert to fraction form
    30,511.51/42,110.87 = 18,246.08/x
  3. Step 3: Cross multiply
    30,511.51x = 42,110.87 × 18,246.08
  4. Step 4: Simplify right side
    30,511.51x = 768,358,316.94
  5. Step 5: Solve for x
    x = 768,358,316.94/30,511.51
  6. Step 6: Final answer
    x = 25,182.57

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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.