Home / 19,784.22-29,678.67-12,389.29

Finding the Fourth Proportional to 19,784.22, 29,678.67 and 12,389.29

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Solution

The fourth proportional to 19,784.22, 29,678.67 and 12,389.29 is: 18,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,784.22 : 29,678.67 = 12,389.29 : x
  2. Step 2: Convert to fraction form
    19,784.22/29,678.67 = 12,389.29/x
  3. Step 3: Cross multiply
    19,784.22x = 29,678.67 × 12,389.29
  4. Step 4: Simplify right side
    19,784.22x = 367,697,575.25
  5. Step 5: Solve for x
    x = 367,697,575.25/19,784.22
  6. Step 6: Final answer
    x = 18,585.40

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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.