Home / 20,864.71-28,777.59-14,491.31

Finding the Fourth Proportional to 20,864.71, 28,777.59 and 14,491.31

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Solution

The fourth proportional to 20,864.71, 28,777.59 and 14,491.31 is: 19,987.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.71 : 28,777.59 = 14,491.31 : x
  2. Step 2: Convert to fraction form
    20,864.71/28,777.59 = 14,491.31/x
  3. Step 3: Cross multiply
    20,864.71x = 28,777.59 × 14,491.31
  4. Step 4: Simplify right side
    20,864.71x = 417,024,887.81
  5. Step 5: Solve for x
    x = 417,024,887.81/20,864.71
  6. Step 6: Final answer
    x = 19,987.09

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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.