Home / 12,989.04-19,483.20-4,221.60

Finding the Fourth Proportional to 12,989.04, 19,483.20 and 4,221.60

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Solution

The fourth proportional to 12,989.04, 19,483.20 and 4,221.60 is: 6,332.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.04 : 19,483.20 = 4,221.60 : x
  2. Step 2: Convert to fraction form
    12,989.04/19,483.20 = 4,221.60/x
  3. Step 3: Cross multiply
    12,989.04x = 19,483.20 × 4,221.60
  4. Step 4: Simplify right side
    12,989.04x = 82,250,277.12
  5. Step 5: Solve for x
    x = 82,250,277.12/12,989.04
  6. Step 6: Final answer
    x = 6,332.28

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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.