Home / 20,665.69-28,510.47-13,493.32

Finding the Fourth Proportional to 20,665.69, 28,510.47 and 13,493.32

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Solution

The fourth proportional to 20,665.69, 28,510.47 and 13,493.32 is: 18,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.69 : 28,510.47 = 13,493.32 : x
  2. Step 2: Convert to fraction form
    20,665.69/28,510.47 = 13,493.32/x
  3. Step 3: Cross multiply
    20,665.69x = 28,510.47 × 13,493.32
  4. Step 4: Simplify right side
    20,665.69x = 384,700,823.78
  5. Step 5: Solve for x
    x = 384,700,823.78/20,665.69
  6. Step 6: Final answer
    x = 18,615.44

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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.