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Finding the Fourth Proportional to 19,478.58, 26,880.06 and 10,980.60

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Solution

The fourth proportional to 19,478.58, 26,880.06 and 10,980.60 is: 15,153.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,478.58 : 26,880.06 = 10,980.60 : x
  2. Step 2: Convert to fraction form
    19,478.58/26,880.06 = 10,980.60/x
  3. Step 3: Cross multiply
    19,478.58x = 26,880.06 × 10,980.60
  4. Step 4: Simplify right side
    19,478.58x = 295,159,186.84
  5. Step 5: Solve for x
    x = 295,159,186.84/19,478.58
  6. Step 6: Final answer
    x = 15,153.01

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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.