Home / 18,885.78-26,068.32-12,915.18

Finding the Fourth Proportional to 18,885.78, 26,068.32 and 12,915.18

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Solution

The fourth proportional to 18,885.78, 26,068.32 and 12,915.18 is: 17,827.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.78 : 26,068.32 = 12,915.18 : x
  2. Step 2: Convert to fraction form
    18,885.78/26,068.32 = 12,915.18/x
  3. Step 3: Cross multiply
    18,885.78x = 26,068.32 × 12,915.18
  4. Step 4: Simplify right side
    18,885.78x = 336,677,045.10
  5. Step 5: Solve for x
    x = 336,677,045.10/18,885.78
  6. Step 6: Final answer
    x = 17,827.01

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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.