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Finding the Fourth Proportional to 19,508.74, 26,913.22 and 12,430.75

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Solution

The fourth proportional to 19,508.74, 26,913.22 and 12,430.75 is: 17,148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,508.74 : 26,913.22 = 12,430.75 : x
  2. Step 2: Convert to fraction form
    19,508.74/26,913.22 = 12,430.75/x
  3. Step 3: Cross multiply
    19,508.74x = 26,913.22 × 12,430.75
  4. Step 4: Simplify right side
    19,508.74x = 334,551,509.52
  5. Step 5: Solve for x
    x = 334,551,509.52/19,508.74
  6. Step 6: Final answer
    x = 17,148.80

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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.