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Finding the Fourth Proportional to 18,143.84, 25,038.08 and 10,186.40

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Solution

The fourth proportional to 18,143.84, 25,038.08 and 10,186.40 is: 14,057.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.84 : 25,038.08 = 10,186.40 : x
  2. Step 2: Convert to fraction form
    18,143.84/25,038.08 = 10,186.40/x
  3. Step 3: Cross multiply
    18,143.84x = 25,038.08 × 10,186.40
  4. Step 4: Simplify right side
    18,143.84x = 255,047,898.11
  5. Step 5: Solve for x
    x = 255,047,898.11/18,143.84
  6. Step 6: Final answer
    x = 14,057.00

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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.