Home / 13,980.64-20,971.62-4,621.50

Finding the Fourth Proportional to 13,980.64, 20,971.62 and 4,621.50

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Solution

The fourth proportional to 13,980.64, 20,971.62 and 4,621.50 is: 6,932.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.64 : 20,971.62 = 4,621.50 : x
  2. Step 2: Convert to fraction form
    13,980.64/20,971.62 = 4,621.50/x
  3. Step 3: Cross multiply
    13,980.64x = 20,971.62 × 4,621.50
  4. Step 4: Simplify right side
    13,980.64x = 96,920,341.83
  5. Step 5: Solve for x
    x = 96,920,341.83/13,980.64
  6. Step 6: Final answer
    x = 6,932.47

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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.