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Finding the Fourth Proportional to 19,300, 26,615.76 and 12,590.80

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Solution

The fourth proportional to 19,300, 26,615.76 and 12,590.80 is: 17,363.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,300 : 26,615.76 = 12,590.80 : x
  2. Step 2: Convert to fraction form
    19,300/26,615.76 = 12,590.80/x
  3. Step 3: Cross multiply
    19,300x = 26,615.76 × 12,590.80
  4. Step 4: Simplify right side
    19,300x = 335,113,711.01
  5. Step 5: Solve for x
    x = 335,113,711.01/19,300
  6. Step 6: Final answer
    x = 17,363.40

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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.