Home / 13,123.60-19,685.40-12,929.20

Finding the Fourth Proportional to 13,123.60, 19,685.40 and 12,929.20

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Solution

The fourth proportional to 13,123.60, 19,685.40 and 12,929.20 is: 19,393.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.60 : 19,685.40 = 12,929.20 : x
  2. Step 2: Convert to fraction form
    13,123.60/19,685.40 = 12,929.20/x
  3. Step 3: Cross multiply
    13,123.60x = 19,685.40 × 12,929.20
  4. Step 4: Simplify right side
    13,123.60x = 254,516,473.68
  5. Step 5: Solve for x
    x = 254,516,473.68/13,123.60
  6. Step 6: Final answer
    x = 19,393.80

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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.