Home / 19,430.10-29,145.15-18,117.90

Finding the Fourth Proportional to 19,430.10, 29,145.15 and 18,117.90

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Solution

The fourth proportional to 19,430.10, 29,145.15 and 18,117.90 is: 27,176.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,430.10 : 29,145.15 = 18,117.90 : x
  2. Step 2: Convert to fraction form
    19,430.10/29,145.15 = 18,117.90/x
  3. Step 3: Cross multiply
    19,430.10x = 29,145.15 × 18,117.90
  4. Step 4: Simplify right side
    19,430.10x = 528,048,913.19
  5. Step 5: Solve for x
    x = 528,048,913.19/19,430.10
  6. Step 6: Final answer
    x = 27,176.85

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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.