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Finding the Fourth Proportional to 15,492.84, 21,385 and 9,903.84

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Solution

The fourth proportional to 15,492.84, 21,385 and 9,903.84 is: 13,670.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.84 : 21,385 = 9,903.84 : x
  2. Step 2: Convert to fraction form
    15,492.84/21,385 = 9,903.84/x
  3. Step 3: Cross multiply
    15,492.84x = 21,385 × 9,903.84
  4. Step 4: Simplify right side
    15,492.84x = 211,793,618.40
  5. Step 5: Solve for x
    x = 211,793,618.40/15,492.84
  6. Step 6: Final answer
    x = 13,670.42

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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.