Home / 13,135.50-18,124.51-7,830.81

Finding the Fourth Proportional to 13,135.50, 18,124.51 and 7,830.81

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Solution

The fourth proportional to 13,135.50, 18,124.51 and 7,830.81 is: 10,805.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.50 : 18,124.51 = 7,830.81 : x
  2. Step 2: Convert to fraction form
    13,135.50/18,124.51 = 7,830.81/x
  3. Step 3: Cross multiply
    13,135.50x = 18,124.51 × 7,830.81
  4. Step 4: Simplify right side
    13,135.50x = 141,929,594.15
  5. Step 5: Solve for x
    x = 141,929,594.15/13,135.50
  6. Step 6: Final answer
    x = 10,805.04

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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.