Finding the Fourth Proportional to 20,779,811.20, 31,106,731.20 and 15,698,972.80
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Solution
The fourth proportional to 20,779,811.20, 31,106,731.20 and 15,698,972.80 is: 23,500,874.11
Step by Step Solution
- Step 1: Write the proportion equation
20,779,811.20 : 31,106,731.20 = 15,698,972.80 : x - Step 2: Convert to fraction form
20,779,811.20/31,106,731.20 = 15,698,972.80/x - Step 3: Cross multiply
20,779,811.20x = 31,106,731.20 × 15,698,972.80 - Step 4: Simplify right side
20,779,811.20x = 488,343,727,005,711.38 - Step 5: Solve for x
x = 488,343,727,005,711.38/20,779,811.20 - Step 6: Final answer
x = 23,500,874.11
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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.