Home / 21,713.40-29,970.38-12,763.77

Finding the Fourth Proportional to 21,713.40, 29,970.38 and 12,763.77

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Solution

The fourth proportional to 21,713.40, 29,970.38 and 12,763.77 is: 17,617.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,713.40 : 29,970.38 = 12,763.77 : x
  2. Step 2: Convert to fraction form
    21,713.40/29,970.38 = 12,763.77/x
  3. Step 3: Cross multiply
    21,713.40x = 29,970.38 × 12,763.77
  4. Step 4: Simplify right side
    21,713.40x = 382,535,037.13
  5. Step 5: Solve for x
    x = 382,535,037.13/21,713.40
  6. Step 6: Final answer
    x = 17,617.46

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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.