Home / 15,615.36-21,549.20-8,541.77

Finding the Fourth Proportional to 15,615.36, 21,549.20 and 8,541.77

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Solution

The fourth proportional to 15,615.36, 21,549.20 and 8,541.77 is: 11,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.36 : 21,549.20 = 8,541.77 : x
  2. Step 2: Convert to fraction form
    15,615.36/21,549.20 = 8,541.77/x
  3. Step 3: Cross multiply
    15,615.36x = 21,549.20 × 8,541.77
  4. Step 4: Simplify right side
    15,615.36x = 184,068,159.63
  5. Step 5: Solve for x
    x = 184,068,159.63/15,615.36
  6. Step 6: Final answer
    x = 11,787.63

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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.