Home / 20,271.34-30,386.34-11,487.70

Finding the Fourth Proportional to 20,271.34, 30,386.34 and 11,487.70

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Solution

The fourth proportional to 20,271.34, 30,386.34 and 11,487.70 is: 17,219.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.34 : 30,386.34 = 11,487.70 : x
  2. Step 2: Convert to fraction form
    20,271.34/30,386.34 = 11,487.70/x
  3. Step 3: Cross multiply
    20,271.34x = 30,386.34 × 11,487.70
  4. Step 4: Simplify right side
    20,271.34x = 349,069,158.02
  5. Step 5: Solve for x
    x = 349,069,158.02/20,271.34
  6. Step 6: Final answer
    x = 17,219.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.