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Finding the Fourth Proportional to 12,692.40, 19,024.98 and 5,291.28

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Solution

The fourth proportional to 12,692.40, 19,024.98 and 5,291.28 is: 7,931.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.40 : 19,024.98 = 5,291.28 : x
  2. Step 2: Convert to fraction form
    12,692.40/19,024.98 = 5,291.28/x
  3. Step 3: Cross multiply
    12,692.40x = 19,024.98 × 5,291.28
  4. Step 4: Simplify right side
    12,692.40x = 100,666,496.17
  5. Step 5: Solve for x
    x = 100,666,496.17/12,692.40
  6. Step 6: Final answer
    x = 7,931.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.