Home / 19,335.20-29,029.80-12,358.40

Finding the Fourth Proportional to 19,335.20, 29,029.80 and 12,358.40

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Solution

The fourth proportional to 19,335.20, 29,029.80 and 12,358.40 is: 18,554.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,335.20 : 29,029.80 = 12,358.40 : x
  2. Step 2: Convert to fraction form
    19,335.20/29,029.80 = 12,358.40/x
  3. Step 3: Cross multiply
    19,335.20x = 29,029.80 × 12,358.40
  4. Step 4: Simplify right side
    19,335.20x = 358,761,880.32
  5. Step 5: Solve for x
    x = 358,761,880.32/19,335.20
  6. Step 6: Final answer
    x = 18,554.86

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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.