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Finding the Fourth Proportional to 60,459.90, 90,690.75 and 21,018.36

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Solution

The fourth proportional to 60,459.90, 90,690.75 and 21,018.36 is: 31,527.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,459.90 : 90,690.75 = 21,018.36 : x
  2. Step 2: Convert to fraction form
    60,459.90/90,690.75 = 21,018.36/x
  3. Step 3: Cross multiply
    60,459.90x = 90,690.75 × 21,018.36
  4. Step 4: Simplify right side
    60,459.90x = 1,906,170,832.17
  5. Step 5: Solve for x
    x = 1,906,170,832.17/60,459.90
  6. Step 6: Final answer
    x = 31,527.85

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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.