Home / 21,378.40-29,491.44-14,305.12

Finding the Fourth Proportional to 21,378.40, 29,491.44 and 14,305.12

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Solution

The fourth proportional to 21,378.40, 29,491.44 and 14,305.12 is: 19,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.40 : 29,491.44 = 14,305.12 : x
  2. Step 2: Convert to fraction form
    21,378.40/29,491.44 = 14,305.12/x
  3. Step 3: Cross multiply
    21,378.40x = 29,491.44 × 14,305.12
  4. Step 4: Simplify right side
    21,378.40x = 421,878,588.17
  5. Step 5: Solve for x
    x = 421,878,588.17/21,378.40
  6. Step 6: Final answer
    x = 19,733.87

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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.