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Finding the Fourth Proportional to 42,802.40, 64,203.60 and 11,212.40

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Solution

The fourth proportional to 42,802.40, 64,203.60 and 11,212.40 is: 16,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,802.40 : 64,203.60 = 11,212.40 : x
  2. Step 2: Convert to fraction form
    42,802.40/64,203.60 = 11,212.40/x
  3. Step 3: Cross multiply
    42,802.40x = 64,203.60 × 11,212.40
  4. Step 4: Simplify right side
    42,802.40x = 719,876,444.64
  5. Step 5: Solve for x
    x = 719,876,444.64/42,802.40
  6. Step 6: Final answer
    x = 16,818.60

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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.