Home / 20,509.50-28,305.25-12,557.03

Finding the Fourth Proportional to 20,509.50, 28,305.25 and 12,557.03

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Solution

The fourth proportional to 20,509.50, 28,305.25 and 12,557.03 is: 17,330.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.50 : 28,305.25 = 12,557.03 : x
  2. Step 2: Convert to fraction form
    20,509.50/28,305.25 = 12,557.03/x
  3. Step 3: Cross multiply
    20,509.50x = 28,305.25 × 12,557.03
  4. Step 4: Simplify right side
    20,509.50x = 355,429,700.49
  5. Step 5: Solve for x
    x = 355,429,700.49/20,509.50
  6. Step 6: Final answer
    x = 17,330.00

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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.