Home / 13,657.86-20,487.51-7,820.10

Finding the Fourth Proportional to 13,657.86, 20,487.51 and 7,820.10

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Solution

The fourth proportional to 13,657.86, 20,487.51 and 7,820.10 is: 11,730.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.86 : 20,487.51 = 7,820.10 : x
  2. Step 2: Convert to fraction form
    13,657.86/20,487.51 = 7,820.10/x
  3. Step 3: Cross multiply
    13,657.86x = 20,487.51 × 7,820.10
  4. Step 4: Simplify right side
    13,657.86x = 160,214,376.95
  5. Step 5: Solve for x
    x = 160,214,376.95/13,657.86
  6. Step 6: Final answer
    x = 11,730.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.