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Finding the Fourth Proportional to 28,210.40, 38,943.60 and 17,615.60

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Solution

The fourth proportional to 28,210.40, 38,943.60 and 17,615.60 is: 24,317.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.40 : 38,943.60 = 17,615.60 : x
  2. Step 2: Convert to fraction form
    28,210.40/38,943.60 = 17,615.60/x
  3. Step 3: Cross multiply
    28,210.40x = 38,943.60 × 17,615.60
  4. Step 4: Simplify right side
    28,210.40x = 686,014,880.16
  5. Step 5: Solve for x
    x = 686,014,880.16/28,210.40
  6. Step 6: Final answer
    x = 24,317.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.