Home / 19,661.40-29,434.12-12,985.65

Finding the Fourth Proportional to 19,661.40, 29,434.12 and 12,985.65

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Solution

The fourth proportional to 19,661.40, 29,434.12 and 12,985.65 is: 19,440.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.40 : 29,434.12 = 12,985.65 : x
  2. Step 2: Convert to fraction form
    19,661.40/29,434.12 = 12,985.65/x
  3. Step 3: Cross multiply
    19,661.40x = 29,434.12 × 12,985.65
  4. Step 4: Simplify right side
    19,661.40x = 382,221,147.91
  5. Step 5: Solve for x
    x = 382,221,147.91/19,661.40
  6. Step 6: Final answer
    x = 19,440.18

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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.