Home / 9,170.64-12,655.28-4,978.89

Finding the Fourth Proportional to 9,170.64, 12,655.28 and 4,978.89

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Solution

The fourth proportional to 9,170.64, 12,655.28 and 4,978.89 is: 6,870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,170.64 : 12,655.28 = 4,978.89 : x
  2. Step 2: Convert to fraction form
    9,170.64/12,655.28 = 4,978.89/x
  3. Step 3: Cross multiply
    9,170.64x = 12,655.28 × 4,978.89
  4. Step 4: Simplify right side
    9,170.64x = 63,009,247.04
  5. Step 5: Solve for x
    x = 63,009,247.04/9,170.64
  6. Step 6: Final answer
    x = 6,870.76

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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.