Home / 20,538.36-28,343.07-12,038.58

Finding the Fourth Proportional to 20,538.36, 28,343.07 and 12,038.58

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Solution

The fourth proportional to 20,538.36, 28,343.07 and 12,038.58 is: 16,613.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.36 : 28,343.07 = 12,038.58 : x
  2. Step 2: Convert to fraction form
    20,538.36/28,343.07 = 12,038.58/x
  3. Step 3: Cross multiply
    20,538.36x = 28,343.07 × 12,038.58
  4. Step 4: Simplify right side
    20,538.36x = 341,210,315.64
  5. Step 5: Solve for x
    x = 341,210,315.64/20,538.36
  6. Step 6: Final answer
    x = 16,613.32

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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.