Home / 20,460.15-28,225.47-13,289.58

Finding the Fourth Proportional to 20,460.15, 28,225.47 and 13,289.58

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Solution

The fourth proportional to 20,460.15, 28,225.47 and 13,289.58 is: 18,333.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.15 : 28,225.47 = 13,289.58 : x
  2. Step 2: Convert to fraction form
    20,460.15/28,225.47 = 13,289.58/x
  3. Step 3: Cross multiply
    20,460.15x = 28,225.47 × 13,289.58
  4. Step 4: Simplify right side
    20,460.15x = 375,104,641.60
  5. Step 5: Solve for x
    x = 375,104,641.60/20,460.15
  6. Step 6: Final answer
    x = 18,333.43

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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.