Home / 20,970.66-28,939.50-11,539.17

Finding the Fourth Proportional to 20,970.66, 28,939.50 and 11,539.17

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Solution

The fourth proportional to 20,970.66, 28,939.50 and 11,539.17 is: 15,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.66 : 28,939.50 = 11,539.17 : x
  2. Step 2: Convert to fraction form
    20,970.66/28,939.50 = 11,539.17/x
  3. Step 3: Cross multiply
    20,970.66x = 28,939.50 × 11,539.17
  4. Step 4: Simplify right side
    20,970.66x = 333,937,810.22
  5. Step 5: Solve for x
    x = 333,937,810.22/20,970.66
  6. Step 6: Final answer
    x = 15,924.05

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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.