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Finding the Fourth Proportional to 18,881.76, 26,075.70 and 15,557.52

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Solution

The fourth proportional to 18,881.76, 26,075.70 and 15,557.52 is: 21,484.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.76 : 26,075.70 = 15,557.52 : x
  2. Step 2: Convert to fraction form
    18,881.76/26,075.70 = 15,557.52/x
  3. Step 3: Cross multiply
    18,881.76x = 26,075.70 × 15,557.52
  4. Step 4: Simplify right side
    18,881.76x = 405,673,224.26
  5. Step 5: Solve for x
    x = 405,673,224.26/18,881.76
  6. Step 6: Final answer
    x = 21,484.93

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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.