Home / 30,579.60-45,869.40-21,248.40

Finding the Fourth Proportional to 30,579.60, 45,869.40 and 21,248.40

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Solution

The fourth proportional to 30,579.60, 45,869.40 and 21,248.40 is: 31,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.60 : 45,869.40 = 21,248.40 : x
  2. Step 2: Convert to fraction form
    30,579.60/45,869.40 = 21,248.40/x
  3. Step 3: Cross multiply
    30,579.60x = 45,869.40 × 21,248.40
  4. Step 4: Simplify right side
    30,579.60x = 974,651,358.96
  5. Step 5: Solve for x
    x = 974,651,358.96/30,579.60
  6. Step 6: Final answer
    x = 31,872.60

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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.