Home / 12,989,913.60-17,925,638.40-7,188,939.84

Finding the Fourth Proportional to 12,989,913.60, 17,925,638.40 and 7,188,939.84

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Solution

The fourth proportional to 12,989,913.60, 17,925,638.40 and 7,188,939.84 is: 9,920,492.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989,913.60 : 17,925,638.40 = 7,188,939.84 : x
  2. Step 2: Convert to fraction form
    12,989,913.60/17,925,638.40 = 7,188,939.84/x
  3. Step 3: Cross multiply
    12,989,913.60x = 17,925,638.40 × 7,188,939.84
  4. Step 4: Simplify right side
    12,989,913.60x = 128,866,336,051,193.84
  5. Step 5: Solve for x
    x = 128,866,336,051,193.84/12,989,913.60
  6. Step 6: Final answer
    x = 9,920,492.16

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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.