Home / 8,724.24-12,038.63-5,138.51

Finding the Fourth Proportional to 8,724.24, 12,038.63 and 5,138.51

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Solution

The fourth proportional to 8,724.24, 12,038.63 and 5,138.51 is: 7,090.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,724.24 : 12,038.63 = 5,138.51 : x
  2. Step 2: Convert to fraction form
    8,724.24/12,038.63 = 5,138.51/x
  3. Step 3: Cross multiply
    8,724.24x = 12,038.63 × 5,138.51
  4. Step 4: Simplify right side
    8,724.24x = 61,860,534.76
  5. Step 5: Solve for x
    x = 61,860,534.76/8,724.24
  6. Step 6: Final answer
    x = 7,090.65

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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.