Home / 21,006.76-28,988.01-11,575.32

Finding the Fourth Proportional to 21,006.76, 28,988.01 and 11,575.32

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Solution

The fourth proportional to 21,006.76, 28,988.01 and 11,575.32 is: 15,973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.76 : 28,988.01 = 11,575.32 : x
  2. Step 2: Convert to fraction form
    21,006.76/28,988.01 = 11,575.32/x
  3. Step 3: Cross multiply
    21,006.76x = 28,988.01 × 11,575.32
  4. Step 4: Simplify right side
    21,006.76x = 335,545,289.10
  5. Step 5: Solve for x
    x = 335,545,289.10/21,006.76
  6. Step 6: Final answer
    x = 15,973.21

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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.