Home / 20,790.58-28,722.36-13,637.47

Finding the Fourth Proportional to 20,790.58, 28,722.36 and 13,637.47

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Solution

The fourth proportional to 20,790.58, 28,722.36 and 13,637.47 is: 18,840.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.58 : 28,722.36 = 13,637.47 : x
  2. Step 2: Convert to fraction form
    20,790.58/28,722.36 = 13,637.47/x
  3. Step 3: Cross multiply
    20,790.58x = 28,722.36 × 13,637.47
  4. Step 4: Simplify right side
    20,790.58x = 391,700,322.83
  5. Step 5: Solve for x
    x = 391,700,322.83/20,790.58
  6. Step 6: Final answer
    x = 18,840.28

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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.