Home / 15,487.76-21,368.40-8,772.32

Finding the Fourth Proportional to 15,487.76, 21,368.40 and 8,772.32

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Solution

The fourth proportional to 15,487.76, 21,368.40 and 8,772.32 is: 12,103.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.76 : 21,368.40 = 8,772.32 : x
  2. Step 2: Convert to fraction form
    15,487.76/21,368.40 = 8,772.32/x
  3. Step 3: Cross multiply
    15,487.76x = 21,368.40 × 8,772.32
  4. Step 4: Simplify right side
    15,487.76x = 187,450,442.69
  5. Step 5: Solve for x
    x = 187,450,442.69/15,487.76
  6. Step 6: Final answer
    x = 12,103.13

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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.