Home / 19,430.79-29,127.69-12,391.04

Finding the Fourth Proportional to 19,430.79, 29,127.69 and 12,391.04

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Solution

The fourth proportional to 19,430.79, 29,127.69 and 12,391.04 is: 18,574.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,430.79 : 29,127.69 = 12,391.04 : x
  2. Step 2: Convert to fraction form
    19,430.79/29,127.69 = 12,391.04/x
  3. Step 3: Cross multiply
    19,430.79x = 29,127.69 × 12,391.04
  4. Step 4: Simplify right side
    19,430.79x = 360,922,226.26
  5. Step 5: Solve for x
    x = 360,922,226.26/19,430.79
  6. Step 6: Final answer
    x = 18,574.76

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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.