Home / 19,931.60-29,897.40-19,785.80

Finding the Fourth Proportional to 19,931.60, 29,897.40 and 19,785.80

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Solution

The fourth proportional to 19,931.60, 29,897.40 and 19,785.80 is: 29,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.60 : 29,897.40 = 19,785.80 : x
  2. Step 2: Convert to fraction form
    19,931.60/29,897.40 = 19,785.80/x
  3. Step 3: Cross multiply
    19,931.60x = 29,897.40 × 19,785.80
  4. Step 4: Simplify right side
    19,931.60x = 591,543,976.92
  5. Step 5: Solve for x
    x = 591,543,976.92/19,931.60
  6. Step 6: Final answer
    x = 29,678.70

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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.