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Finding the Fourth Proportional to 14,407.99, 19,886.78 and 9,385.99

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Solution

The fourth proportional to 14,407.99, 19,886.78 and 9,385.99 is: 12,955.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,407.99 : 19,886.78 = 9,385.99 : x
  2. Step 2: Convert to fraction form
    14,407.99/19,886.78 = 9,385.99/x
  3. Step 3: Cross multiply
    14,407.99x = 19,886.78 × 9,385.99
  4. Step 4: Simplify right side
    14,407.99x = 186,657,091.96
  5. Step 5: Solve for x
    x = 186,657,091.96/14,407.99
  6. Step 6: Final answer
    x = 12,955.11

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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.