Home / 18,867,705.90-28,301,558.85-12,821,088.30

Finding the Fourth Proportional to 18,867,705.90, 28,301,558.85 and 12,821,088.30

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Solution

The fourth proportional to 18,867,705.90, 28,301,558.85 and 12,821,088.30 is: 19,231,632.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867,705.90 : 28,301,558.85 = 12,821,088.30 : x
  2. Step 2: Convert to fraction form
    18,867,705.90/28,301,558.85 = 12,821,088.30/x
  3. Step 3: Cross multiply
    18,867,705.90x = 28,301,558.85 × 12,821,088.30
  4. Step 4: Simplify right side
    18,867,705.90x = 362,856,785,043,496.50
  5. Step 5: Solve for x
    x = 362,856,785,043,496.50/18,867,705.90
  6. Step 6: Final answer
    x = 19,231,632.45

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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.