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Finding the Fourth Proportional to 18,789,915.60, 26,249,194.80 and 18,789,915.60

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Solution

The fourth proportional to 18,789,915.60, 26,249,194.80 and 18,789,915.60 is: 26,249,194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789,915.60 : 26,249,194.80 = 18,789,915.60 : x
  2. Step 2: Convert to fraction form
    18,789,915.60/26,249,194.80 = 18,789,915.60/x
  3. Step 3: Cross multiply
    18,789,915.60x = 26,249,194.80 × 18,789,915.60
  4. Step 4: Simplify right side
    18,789,915.60x = 493,220,154,859,958.94
  5. Step 5: Solve for x
    x = 493,220,154,859,958.94/18,789,915.60
  6. Step 6: Final answer
    x = 26,249,194.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.