Home / 20,309.04-30,472.64-12,911.52

Finding the Fourth Proportional to 20,309.04, 30,472.64 and 12,911.52

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Solution

The fourth proportional to 20,309.04, 30,472.64 and 12,911.52 is: 19,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.04 : 30,472.64 = 12,911.52 : x
  2. Step 2: Convert to fraction form
    20,309.04/30,472.64 = 12,911.52/x
  3. Step 3: Cross multiply
    20,309.04x = 30,472.64 × 12,911.52
  4. Step 4: Simplify right side
    20,309.04x = 393,448,100.81
  5. Step 5: Solve for x
    x = 393,448,100.81/20,309.04
  6. Step 6: Final answer
    x = 19,373.05

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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.