Home / 20,700.36-28,557.01-12,198.40

Finding the Fourth Proportional to 20,700.36, 28,557.01 and 12,198.40

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Solution

The fourth proportional to 20,700.36, 28,557.01 and 12,198.40 is: 16,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.36 : 28,557.01 = 12,198.40 : x
  2. Step 2: Convert to fraction form
    20,700.36/28,557.01 = 12,198.40/x
  3. Step 3: Cross multiply
    20,700.36x = 28,557.01 × 12,198.40
  4. Step 4: Simplify right side
    20,700.36x = 348,349,706.02
  5. Step 5: Solve for x
    x = 348,349,706.02/20,700.36
  6. Step 6: Final answer
    x = 16,828.20

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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.