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Finding the Fourth Proportional to 4,978.15, 6,867.53 and 2,985.24

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Solution

The fourth proportional to 4,978.15, 6,867.53 and 2,985.24 is: 4,118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.15 : 6,867.53 = 2,985.24 : x
  2. Step 2: Convert to fraction form
    4,978.15/6,867.53 = 2,985.24/x
  3. Step 3: Cross multiply
    4,978.15x = 6,867.53 × 2,985.24
  4. Step 4: Simplify right side
    4,978.15x = 20,501,225.26
  5. Step 5: Solve for x
    x = 20,501,225.26/4,978.15
  6. Step 6: Final answer
    x = 4,118.24

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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.