Home / 20,483.77-28,271.34-11,985.40

Finding the Fourth Proportional to 20,483.77, 28,271.34 and 11,985.40

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Solution

The fourth proportional to 20,483.77, 28,271.34 and 11,985.40 is: 16,542.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.77 : 28,271.34 = 11,985.40 : x
  2. Step 2: Convert to fraction form
    20,483.77/28,271.34 = 11,985.40/x
  3. Step 3: Cross multiply
    20,483.77x = 28,271.34 × 11,985.40
  4. Step 4: Simplify right side
    20,483.77x = 338,843,318.44
  5. Step 5: Solve for x
    x = 338,843,318.44/20,483.77
  6. Step 6: Final answer
    x = 16,542.04

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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.