Home / 13,878.02-20,820.10-6,478.44

Finding the Fourth Proportional to 13,878.02, 20,820.10 and 6,478.44

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Solution

The fourth proportional to 13,878.02, 20,820.10 and 6,478.44 is: 9,719.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.02 : 20,820.10 = 6,478.44 : x
  2. Step 2: Convert to fraction form
    13,878.02/20,820.10 = 6,478.44/x
  3. Step 3: Cross multiply
    13,878.02x = 20,820.10 × 6,478.44
  4. Step 4: Simplify right side
    13,878.02x = 134,881,768.64
  5. Step 5: Solve for x
    x = 134,881,768.64/13,878.02
  6. Step 6: Final answer
    x = 9,719.09

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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.