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Finding the Fourth Proportional to 15,806.58, 21,810.86 and 9,089.76

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Solution

The fourth proportional to 15,806.58, 21,810.86 and 9,089.76 is: 12,542.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.58 : 21,810.86 = 9,089.76 : x
  2. Step 2: Convert to fraction form
    15,806.58/21,810.86 = 9,089.76/x
  3. Step 3: Cross multiply
    15,806.58x = 21,810.86 × 9,089.76
  4. Step 4: Simplify right side
    15,806.58x = 198,255,482.79
  5. Step 5: Solve for x
    x = 198,255,482.79/15,806.58
  6. Step 6: Final answer
    x = 12,542.59

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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.