Home / 30,986.49-42,756.91-18,232.09

Finding the Fourth Proportional to 30,986.49, 42,756.91 and 18,232.09

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Solution

The fourth proportional to 30,986.49, 42,756.91 and 18,232.09 is: 25,157.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.49 : 42,756.91 = 18,232.09 : x
  2. Step 2: Convert to fraction form
    30,986.49/42,756.91 = 18,232.09/x
  3. Step 3: Cross multiply
    30,986.49x = 42,756.91 × 18,232.09
  4. Step 4: Simplify right side
    30,986.49x = 779,547,740.08
  5. Step 5: Solve for x
    x = 779,547,740.08/30,986.49
  6. Step 6: Final answer
    x = 25,157.67

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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.