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Finding the Fourth Proportional to 15,897.89, 21,935.18 and 9,525.51

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Solution

The fourth proportional to 15,897.89, 21,935.18 and 9,525.51 is: 13,142.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,897.89 : 21,935.18 = 9,525.51 : x
  2. Step 2: Convert to fraction form
    15,897.89/21,935.18 = 9,525.51/x
  3. Step 3: Cross multiply
    15,897.89x = 21,935.18 × 9,525.51
  4. Step 4: Simplify right side
    15,897.89x = 208,943,728.81
  5. Step 5: Solve for x
    x = 208,943,728.81/15,897.89
  6. Step 6: Final answer
    x = 13,142.86

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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.