Home / 14,655.12-20,220.48-8,688.20

Finding the Fourth Proportional to 14,655.12, 20,220.48 and 8,688.20

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Solution

The fourth proportional to 14,655.12, 20,220.48 and 8,688.20 is: 11,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,655.12 : 20,220.48 = 8,688.20 : x
  2. Step 2: Convert to fraction form
    14,655.12/20,220.48 = 8,688.20/x
  3. Step 3: Cross multiply
    14,655.12x = 20,220.48 × 8,688.20
  4. Step 4: Simplify right side
    14,655.12x = 175,679,574.34
  5. Step 5: Solve for x
    x = 175,679,574.34/14,655.12
  6. Step 6: Final answer
    x = 11,987.59

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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.