Home / 21,023.57-29,011.49-11,947.76

Finding the Fourth Proportional to 21,023.57, 29,011.49 and 11,947.76

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Solution

The fourth proportional to 21,023.57, 29,011.49 and 11,947.76 is: 16,487.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.57 : 29,011.49 = 11,947.76 : x
  2. Step 2: Convert to fraction form
    21,023.57/29,011.49 = 11,947.76/x
  3. Step 3: Cross multiply
    21,023.57x = 29,011.49 × 11,947.76
  4. Step 4: Simplify right side
    21,023.57x = 346,622,159.77
  5. Step 5: Solve for x
    x = 346,622,159.77/21,023.57
  6. Step 6: Final answer
    x = 16,487.31

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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.