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Finding the Fourth Proportional to 13,558.71, 18,711.06 and 7,590.36

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Solution

The fourth proportional to 13,558.71, 18,711.06 and 7,590.36 is: 10,474.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.71 : 18,711.06 = 7,590.36 : x
  2. Step 2: Convert to fraction form
    13,558.71/18,711.06 = 7,590.36/x
  3. Step 3: Cross multiply
    13,558.71x = 18,711.06 × 7,590.36
  4. Step 4: Simplify right side
    13,558.71x = 142,023,681.38
  5. Step 5: Solve for x
    x = 142,023,681.38/13,558.71
  6. Step 6: Final answer
    x = 10,474.72

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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.