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Finding the Fourth Proportional to 15,409.51, 21,264.95 and 8,697.31

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Solution

The fourth proportional to 15,409.51, 21,264.95 and 8,697.31 is: 12,002.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.51 : 21,264.95 = 8,697.31 : x
  2. Step 2: Convert to fraction form
    15,409.51/21,264.95 = 8,697.31/x
  3. Step 3: Cross multiply
    15,409.51x = 21,264.95 × 8,697.31
  4. Step 4: Simplify right side
    15,409.51x = 184,947,830.87
  5. Step 5: Solve for x
    x = 184,947,830.87/15,409.51
  6. Step 6: Final answer
    x = 12,002.19

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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.