Home / 20,989.48-28,956.29-13,810.17

Finding the Fourth Proportional to 20,989.48, 28,956.29 and 13,810.17

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Solution

The fourth proportional to 20,989.48, 28,956.29 and 13,810.17 is: 19,051.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.48 : 28,956.29 = 13,810.17 : x
  2. Step 2: Convert to fraction form
    20,989.48/28,956.29 = 13,810.17/x
  3. Step 3: Cross multiply
    20,989.48x = 28,956.29 × 13,810.17
  4. Step 4: Simplify right side
    20,989.48x = 399,891,287.47
  5. Step 5: Solve for x
    x = 399,891,287.47/20,989.48
  6. Step 6: Final answer
    x = 19,051.99

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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.