Home / 21,004.20-28,985.10-11,572.74

Finding the Fourth Proportional to 21,004.20, 28,985.10 and 11,572.74

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Solution

The fourth proportional to 21,004.20, 28,985.10 and 11,572.74 is: 15,970.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.20 : 28,985.10 = 11,572.74 : x
  2. Step 2: Convert to fraction form
    21,004.20/28,985.10 = 11,572.74/x
  3. Step 3: Cross multiply
    21,004.20x = 28,985.10 × 11,572.74
  4. Step 4: Simplify right side
    21,004.20x = 335,437,026.17
  5. Step 5: Solve for x
    x = 335,437,026.17/21,004.20
  6. Step 6: Final answer
    x = 15,970.00

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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.