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Finding the Fourth Proportional to 30,605.60, 45,908.40 and 9,831.20

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Solution

The fourth proportional to 30,605.60, 45,908.40 and 9,831.20 is: 14,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605.60 : 45,908.40 = 9,831.20 : x
  2. Step 2: Convert to fraction form
    30,605.60/45,908.40 = 9,831.20/x
  3. Step 3: Cross multiply
    30,605.60x = 45,908.40 × 9,831.20
  4. Step 4: Simplify right side
    30,605.60x = 451,334,662.08
  5. Step 5: Solve for x
    x = 451,334,662.08/30,605.60
  6. Step 6: Final answer
    x = 14,746.80

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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.