Home / 19,814.40-29,721.60-12,427.20

Finding the Fourth Proportional to 19,814.40, 29,721.60 and 12,427.20

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Solution

The fourth proportional to 19,814.40, 29,721.60 and 12,427.20 is: 18,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,814.40 : 29,721.60 = 12,427.20 : x
  2. Step 2: Convert to fraction form
    19,814.40/29,721.60 = 12,427.20/x
  3. Step 3: Cross multiply
    19,814.40x = 29,721.60 × 12,427.20
  4. Step 4: Simplify right side
    19,814.40x = 369,356,267.52
  5. Step 5: Solve for x
    x = 369,356,267.52/19,814.40
  6. Step 6: Final answer
    x = 18,640.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.