Home / 20,931,969.40-31,397,954.10-19,671,220.60

Finding the Fourth Proportional to 20,931,969.40, 31,397,954.10 and 19,671,220.60

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Solution

The fourth proportional to 20,931,969.40, 31,397,954.10 and 19,671,220.60 is: 29,506,830.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931,969.40 : 31,397,954.10 = 19,671,220.60 : x
  2. Step 2: Convert to fraction form
    20,931,969.40/31,397,954.10 = 19,671,220.60/x
  3. Step 3: Cross multiply
    20,931,969.40x = 31,397,954.10 × 19,671,220.60
  4. Step 4: Simplify right side
    20,931,969.40x = 617,636,081,489,774.50
  5. Step 5: Solve for x
    x = 617,636,081,489,774.50/20,931,969.40
  6. Step 6: Final answer
    x = 29,506,830.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.