Home / 28,030.69-38,682.20-15,455.45

Finding the Fourth Proportional to 28,030.69, 38,682.20 and 15,455.45

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Solution

The fourth proportional to 28,030.69, 38,682.20 and 15,455.45 is: 21,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.69 : 38,682.20 = 15,455.45 : x
  2. Step 2: Convert to fraction form
    28,030.69/38,682.20 = 15,455.45/x
  3. Step 3: Cross multiply
    28,030.69x = 38,682.20 × 15,455.45
  4. Step 4: Simplify right side
    28,030.69x = 597,850,730.71
  5. Step 5: Solve for x
    x = 597,850,730.71/28,030.69
  6. Step 6: Final answer
    x = 21,328.43

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Half scale
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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.