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Finding the Fourth Proportional to 15,618.51, 21,555.02 and 8,545.99

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Solution

The fourth proportional to 15,618.51, 21,555.02 and 8,545.99 is: 11,794.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,618.51 : 21,555.02 = 8,545.99 : x
  2. Step 2: Convert to fraction form
    15,618.51/21,555.02 = 8,545.99/x
  3. Step 3: Cross multiply
    15,618.51x = 21,555.02 × 8,545.99
  4. Step 4: Simplify right side
    15,618.51x = 184,208,985.37
  5. Step 5: Solve for x
    x = 184,208,985.37/15,618.51
  6. Step 6: Final answer
    x = 11,794.27

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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.