Home / 10,347.88-15,531.53-5,421.05

Finding the Fourth Proportional to 10,347.88, 15,531.53 and 5,421.05

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Solution

The fourth proportional to 10,347.88, 15,531.53 and 5,421.05 is: 8,136.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,347.88 : 15,531.53 = 5,421.05 : x
  2. Step 2: Convert to fraction form
    10,347.88/15,531.53 = 5,421.05/x
  3. Step 3: Cross multiply
    10,347.88x = 15,531.53 × 5,421.05
  4. Step 4: Simplify right side
    10,347.88x = 84,197,200.71
  5. Step 5: Solve for x
    x = 84,197,200.71/10,347.88
  6. Step 6: Final answer
    x = 8,136.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.