Home / 12,390.32-18,572.40-5,811.08

Finding the Fourth Proportional to 12,390.32, 18,572.40 and 5,811.08

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Solution

The fourth proportional to 12,390.32, 18,572.40 and 5,811.08 is: 8,710.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.32 : 18,572.40 = 5,811.08 : x
  2. Step 2: Convert to fraction form
    12,390.32/18,572.40 = 5,811.08/x
  3. Step 3: Cross multiply
    12,390.32x = 18,572.40 × 5,811.08
  4. Step 4: Simplify right side
    12,390.32x = 107,925,702.19
  5. Step 5: Solve for x
    x = 107,925,702.19/12,390.32
  6. Step 6: Final answer
    x = 8,710.49

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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.