Home / 20,835.92-28,762.81-13,292.15

Finding the Fourth Proportional to 20,835.92, 28,762.81 and 13,292.15

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Solution

The fourth proportional to 20,835.92, 28,762.81 and 13,292.15 is: 18,349.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.92 : 28,762.81 = 13,292.15 : x
  2. Step 2: Convert to fraction form
    20,835.92/28,762.81 = 13,292.15/x
  3. Step 3: Cross multiply
    20,835.92x = 28,762.81 × 13,292.15
  4. Step 4: Simplify right side
    20,835.92x = 382,319,407.90
  5. Step 5: Solve for x
    x = 382,319,407.90/20,835.92
  6. Step 6: Final answer
    x = 18,349.05

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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.