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Finding the Fourth Proportional to 14,355.99, 19,810.04 and 7,981.47

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Solution

The fourth proportional to 14,355.99, 19,810.04 and 7,981.47 is: 11,013.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,355.99 : 19,810.04 = 7,981.47 : x
  2. Step 2: Convert to fraction form
    14,355.99/19,810.04 = 7,981.47/x
  3. Step 3: Cross multiply
    14,355.99x = 19,810.04 × 7,981.47
  4. Step 4: Simplify right side
    14,355.99x = 158,113,200.05
  5. Step 5: Solve for x
    x = 158,113,200.05/14,355.99
  6. Step 6: Final answer
    x = 11,013.74

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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.