Home / 20,761.90-28,642.70-14,477.92

Finding the Fourth Proportional to 20,761.90, 28,642.70 and 14,477.92

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Solution

The fourth proportional to 20,761.90, 28,642.70 and 14,477.92 is: 19,973.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.90 : 28,642.70 = 14,477.92 : x
  2. Step 2: Convert to fraction form
    20,761.90/28,642.70 = 14,477.92/x
  3. Step 3: Cross multiply
    20,761.90x = 28,642.70 × 14,477.92
  4. Step 4: Simplify right side
    20,761.90x = 414,686,719.18
  5. Step 5: Solve for x
    x = 414,686,719.18/20,761.90
  6. Step 6: Final answer
    x = 19,973.45

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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.