Home / 21,004.21-28,985.79-11,572.77

Finding the Fourth Proportional to 21,004.21, 28,985.79 and 11,572.77

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Solution

The fourth proportional to 21,004.21, 28,985.79 and 11,572.77 is: 15,970.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.21 : 28,985.79 = 11,572.77 : x
  2. Step 2: Convert to fraction form
    21,004.21/28,985.79 = 11,572.77/x
  3. Step 3: Cross multiply
    21,004.21x = 28,985.79 × 11,572.77
  4. Step 4: Simplify right side
    21,004.21x = 335,445,880.94
  5. Step 5: Solve for x
    x = 335,445,880.94/21,004.21
  6. Step 6: Final answer
    x = 15,970.41

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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.