Home / 28,465.08-39,281.64-15,719.07

Finding the Fourth Proportional to 28,465.08, 39,281.64 and 15,719.07

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Solution

The fourth proportional to 28,465.08, 39,281.64 and 15,719.07 is: 21,692.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.08 : 39,281.64 = 15,719.07 : x
  2. Step 2: Convert to fraction form
    28,465.08/39,281.64 = 15,719.07/x
  3. Step 3: Cross multiply
    28,465.08x = 39,281.64 × 15,719.07
  4. Step 4: Simplify right side
    28,465.08x = 617,470,848.87
  5. Step 5: Solve for x
    x = 617,470,848.87/28,465.08
  6. Step 6: Final answer
    x = 21,692.22

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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.