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Finding the Fourth Proportional to 21,698.40, 32,547.60 and 7,845.60

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Solution

The fourth proportional to 21,698.40, 32,547.60 and 7,845.60 is: 11,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.40 : 32,547.60 = 7,845.60 : x
  2. Step 2: Convert to fraction form
    21,698.40/32,547.60 = 7,845.60/x
  3. Step 3: Cross multiply
    21,698.40x = 32,547.60 × 7,845.60
  4. Step 4: Simplify right side
    21,698.40x = 255,355,450.56
  5. Step 5: Solve for x
    x = 255,355,450.56/21,698.40
  6. Step 6: Final answer
    x = 11,768.40

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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.