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Finding the Fourth Proportional to 19,507.89, 26,920.89 and 10,555.40

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Solution

The fourth proportional to 19,507.89, 26,920.89 and 10,555.40 is: 14,566.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,507.89 : 26,920.89 = 10,555.40 : x
  2. Step 2: Convert to fraction form
    19,507.89/26,920.89 = 10,555.40/x
  3. Step 3: Cross multiply
    19,507.89x = 26,920.89 × 10,555.40
  4. Step 4: Simplify right side
    19,507.89x = 284,160,829.61
  5. Step 5: Solve for x
    x = 284,160,829.61/19,507.89
  6. Step 6: Final answer
    x = 14,566.45

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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.