Home / 30,437.60-45,656.40-18,712.80

Finding the Fourth Proportional to 30,437.60, 45,656.40 and 18,712.80

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Solution

The fourth proportional to 30,437.60, 45,656.40 and 18,712.80 is: 28,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,437.60 : 45,656.40 = 18,712.80 : x
  2. Step 2: Convert to fraction form
    30,437.60/45,656.40 = 18,712.80/x
  3. Step 3: Cross multiply
    30,437.60x = 45,656.40 × 18,712.80
  4. Step 4: Simplify right side
    30,437.60x = 854,359,081.92
  5. Step 5: Solve for x
    x = 854,359,081.92/30,437.60
  6. Step 6: Final answer
    x = 28,069.20

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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.