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Finding the Fourth Proportional to 31,307.63, 46,981.81 and 13,555.63

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Solution

The fourth proportional to 31,307.63, 46,981.81 and 13,555.63 is: 20,342.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,307.63 : 46,981.81 = 13,555.63 : x
  2. Step 2: Convert to fraction form
    31,307.63/46,981.81 = 13,555.63/x
  3. Step 3: Cross multiply
    31,307.63x = 46,981.81 × 13,555.63
  4. Step 4: Simplify right side
    31,307.63x = 636,867,730.40
  5. Step 5: Solve for x
    x = 636,867,730.40/31,307.63
  6. Step 6: Final answer
    x = 20,342.25

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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.