Home / 28,012,919.40-42,019,379.10-19,793,298.60

Finding the Fourth Proportional to 28,012,919.40, 42,019,379.10 and 19,793,298.60

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Solution

The fourth proportional to 28,012,919.40, 42,019,379.10 and 19,793,298.60 is: 29,689,947.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,012,919.40 : 42,019,379.10 = 19,793,298.60 : x
  2. Step 2: Convert to fraction form
    28,012,919.40/42,019,379.10 = 19,793,298.60/x
  3. Step 3: Cross multiply
    28,012,919.40x = 42,019,379.10 × 19,793,298.60
  4. Step 4: Simplify right side
    28,012,919.40x = 831,702,117,512,899.38
  5. Step 5: Solve for x
    x = 831,702,117,512,899.38/28,012,919.40
  6. Step 6: Final answer
    x = 29,689,947.90

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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.