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Finding the Fourth Proportional to 42,800.40, 64,200.60 and 11,210.40

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Solution

The fourth proportional to 42,800.40, 64,200.60 and 11,210.40 is: 16,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,800.40 : 64,200.60 = 11,210.40 : x
  2. Step 2: Convert to fraction form
    42,800.40/64,200.60 = 11,210.40/x
  3. Step 3: Cross multiply
    42,800.40x = 64,200.60 × 11,210.40
  4. Step 4: Simplify right side
    42,800.40x = 719,714,406.24
  5. Step 5: Solve for x
    x = 719,714,406.24/42,800.40
  6. Step 6: Final answer
    x = 16,815.60

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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.