Home / 10,521.19-15,783.39-4,977.55

Finding the Fourth Proportional to 10,521.19, 15,783.39 and 4,977.55

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Solution

The fourth proportional to 10,521.19, 15,783.39 and 4,977.55 is: 7,467.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.19 : 15,783.39 = 4,977.55 : x
  2. Step 2: Convert to fraction form
    10,521.19/15,783.39 = 4,977.55/x
  3. Step 3: Cross multiply
    10,521.19x = 15,783.39 × 4,977.55
  4. Step 4: Simplify right side
    10,521.19x = 78,562,612.89
  5. Step 5: Solve for x
    x = 78,562,612.89/10,521.19
  6. Step 6: Final answer
    x = 7,467.08

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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.