Home / 20,721.04-28,582.44-13,256.08

Finding the Fourth Proportional to 20,721.04, 28,582.44 and 13,256.08

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Solution

The fourth proportional to 20,721.04, 28,582.44 and 13,256.08 is: 18,285.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.04 : 28,582.44 = 13,256.08 : x
  2. Step 2: Convert to fraction form
    20,721.04/28,582.44 = 13,256.08/x
  3. Step 3: Cross multiply
    20,721.04x = 28,582.44 × 13,256.08
  4. Step 4: Simplify right side
    20,721.04x = 378,891,111.24
  5. Step 5: Solve for x
    x = 378,891,111.24/20,721.04
  6. Step 6: Final answer
    x = 18,285.33

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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.