Home / 28,421.64-39,219.10-16,485.76

Finding the Fourth Proportional to 28,421.64, 39,219.10 and 16,485.76

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Solution

The fourth proportional to 28,421.64, 39,219.10 and 16,485.76 is: 22,748.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.64 : 39,219.10 = 16,485.76 : x
  2. Step 2: Convert to fraction form
    28,421.64/39,219.10 = 16,485.76/x
  3. Step 3: Cross multiply
    28,421.64x = 39,219.10 × 16,485.76
  4. Step 4: Simplify right side
    28,421.64x = 646,556,670.02
  5. Step 5: Solve for x
    x = 646,556,670.02/28,421.64
  6. Step 6: Final answer
    x = 22,748.75

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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.