Home / 15,681.58-21,636.74-8,875.72

Finding the Fourth Proportional to 15,681.58, 21,636.74 and 8,875.72

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Solution

The fourth proportional to 15,681.58, 21,636.74 and 8,875.72 is: 12,246.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.58 : 21,636.74 = 8,875.72 : x
  2. Step 2: Convert to fraction form
    15,681.58/21,636.74 = 8,875.72/x
  3. Step 3: Cross multiply
    15,681.58x = 21,636.74 × 8,875.72
  4. Step 4: Simplify right side
    15,681.58x = 192,041,645.95
  5. Step 5: Solve for x
    x = 192,041,645.95/15,681.58
  6. Step 6: Final answer
    x = 12,246.32

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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.