Home / 15,445.16-21,315.65-8,731.98

Finding the Fourth Proportional to 15,445.16, 21,315.65 and 8,731.98

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Solution

The fourth proportional to 15,445.16, 21,315.65 and 8,731.98 is: 12,050.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.16 : 21,315.65 = 8,731.98 : x
  2. Step 2: Convert to fraction form
    15,445.16/21,315.65 = 8,731.98/x
  3. Step 3: Cross multiply
    15,445.16x = 21,315.65 × 8,731.98
  4. Step 4: Simplify right side
    15,445.16x = 186,127,829.49
  5. Step 5: Solve for x
    x = 186,127,829.49/15,445.16
  6. Step 6: Final answer
    x = 12,050.88

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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.