Home / 14,188.96-21,280.40-5,420.80

Finding the Fourth Proportional to 14,188.96, 21,280.40 and 5,420.80

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Solution

The fourth proportional to 14,188.96, 21,280.40 and 5,420.80 is: 8,130.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,188.96 : 21,280.40 = 5,420.80 : x
  2. Step 2: Convert to fraction form
    14,188.96/21,280.40 = 5,420.80/x
  3. Step 3: Cross multiply
    14,188.96x = 21,280.40 × 5,420.80
  4. Step 4: Simplify right side
    14,188.96x = 115,356,792.32
  5. Step 5: Solve for x
    x = 115,356,792.32/14,188.96
  6. Step 6: Final answer
    x = 8,130.04

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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.