Home / 8,720.15-12,038.26-5,902.42

Finding the Fourth Proportional to 8,720.15, 12,038.26 and 5,902.42

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Solution

The fourth proportional to 8,720.15, 12,038.26 and 5,902.42 is: 8,148.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.15 : 12,038.26 = 5,902.42 : x
  2. Step 2: Convert to fraction form
    8,720.15/12,038.26 = 5,902.42/x
  3. Step 3: Cross multiply
    8,720.15x = 12,038.26 × 5,902.42
  4. Step 4: Simplify right side
    8,720.15x = 71,054,851.25
  5. Step 5: Solve for x
    x = 71,054,851.25/8,720.15
  6. Step 6: Final answer
    x = 8,148.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.