Home / 15,417.78-21,281.85-9,129.84

Finding the Fourth Proportional to 15,417.78, 21,281.85 and 9,129.84

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Solution

The fourth proportional to 15,417.78, 21,281.85 and 9,129.84 is: 12,602.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417.78 : 21,281.85 = 9,129.84 : x
  2. Step 2: Convert to fraction form
    15,417.78/21,281.85 = 9,129.84/x
  3. Step 3: Cross multiply
    15,417.78x = 21,281.85 × 9,129.84
  4. Step 4: Simplify right side
    15,417.78x = 194,299,885.40
  5. Step 5: Solve for x
    x = 194,299,885.40/15,417.78
  6. Step 6: Final answer
    x = 12,602.33

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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.