Home / 5,430.18-8,140.20-1,918.22

Finding the Fourth Proportional to 5,430.18, 8,140.20 and 1,918.22

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Solution

The fourth proportional to 5,430.18, 8,140.20 and 1,918.22 is: 2,875.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.18 : 8,140.20 = 1,918.22 : x
  2. Step 2: Convert to fraction form
    5,430.18/8,140.20 = 1,918.22/x
  3. Step 3: Cross multiply
    5,430.18x = 8,140.20 × 1,918.22
  4. Step 4: Simplify right side
    5,430.18x = 15,614,680.89
  5. Step 5: Solve for x
    x = 15,614,680.89/5,430.18
  6. Step 6: Final answer
    x = 2,875.54

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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.