Home / 21,428.40-32,144.71-7,386.58

Finding the Fourth Proportional to 21,428.40, 32,144.71 and 7,386.58

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Solution

The fourth proportional to 21,428.40, 32,144.71 and 7,386.58 is: 11,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.40 : 32,144.71 = 7,386.58 : x
  2. Step 2: Convert to fraction form
    21,428.40/32,144.71 = 7,386.58/x
  3. Step 3: Cross multiply
    21,428.40x = 32,144.71 × 7,386.58
  4. Step 4: Simplify right side
    21,428.40x = 237,439,439.41
  5. Step 5: Solve for x
    x = 237,439,439.41/21,428.40
  6. Step 6: Final answer
    x = 11,080.60

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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.