Home / 13,870.64-20,787.60-7,283.36

Finding the Fourth Proportional to 13,870.64, 20,787.60 and 7,283.36

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Solution

The fourth proportional to 13,870.64, 20,787.60 and 7,283.36 is: 10,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.64 : 20,787.60 = 7,283.36 : x
  2. Step 2: Convert to fraction form
    13,870.64/20,787.60 = 7,283.36/x
  3. Step 3: Cross multiply
    13,870.64x = 20,787.60 × 7,283.36
  4. Step 4: Simplify right side
    13,870.64x = 151,403,574.34
  5. Step 5: Solve for x
    x = 151,403,574.34/13,870.64
  6. Step 6: Final answer
    x = 10,915.40

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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.